2791 . The average age of 15 people is 25 years. Out of them, total age of 2 people is 115 years. What is the average age of the other 13 people?

A. 20 years
B. 25 years
C. 22.5 years
D. 57.5 years
E. None of these

View Answer	Favorite Question

Answer: Option A

Explanation:

Total age of 15 people = 15 x 25 = 375 years

Total age of 2 people = 115 years

Total age of the other 13 people = 275 - 115 = 160

So, the average age of the other 13 people = 160/13 = 20 years

প্রিমিয়াম প্ল্যান: ১ মাস

99 ৳

৩০ দিনের জন্য সকল লাইভ এবং আর্কাইভ মডেল টেস্ট, প্রশ্ন ব্যাংক ও লেকচার শিট সহ অ্যাপ এর প্রিমিয়াম সব এক্সেস পাবেন।

সাবস্ক্রিপশন লিংক

2792 . The average age of 40 employees in abranch of a bank is 35 years. When a new employee joined the bank the average age increased to 35.5 years. What is the age of the new employee?

A. 55.5
B. 50
C. 50.5
D. 20.5

View Answer	Favorite Question

Answer: Option A

Explanation:

Total age of 40 employees = 40×35 = 1400 years

Total age of 41 employees = 41×35.5 = 1455.5 years

Age of the new employee = 1455.5 - 1400 = 55.5 years

2793 . The average age of 8 men is increased by 2 years when one of them whose age is 24 years is replaced by a woman. What is the age of the woman ?

A. 35 years
B. 28 years
C. 32 years
D. 40 years

View Answer	Favorite Question

Answer: Option D

Explanation:

মহিলাটির বয়স = 8 × 2 + 24

= 16 + 24

= 40 বছর

2794 . The average age of A, B And C sis 30 years. If the difference between B's age and A's age is same as the difference between C's age and B's age . If D is 40 years older than B then what is the sum of the age B and D?

A. 130 years
B. 60 years
C. 75 years
D. 100 years

View Answer	Favorite Question

Answer: Option D

Explanation:

ATQ, B - A = C - B

= > 2B = A + C

Now, A + B + C = 30 x3 = 90

= > B + (A + C) = 90

= > B + 2B = 90

= > 3B = 90 :: B = 30

D's age = 30 + 40 = 70

B + D = 70 + 30 = 100 (Ans) .

Officer (General) |-Sonali | Janata | Bangladesh Krishi_Bangladesh Development bank ২৪.০৫.২০১৯

A. 48
B. 46
C. 42
D. 45

View Answer	Favorite Question

Answer: Option B

Explanation:

A + B + C + D + E = 40 × 5 = 200
A + B = 35 × 2 = 70
C + D = 42 × 2 = 84
Therefore,
E = (A + B + C + D + E) - (A + B + C + D)
E = 200 - 70 - 84
E = 46 years.

অফিসার (ক্যাশ ) - Sonali | Rupali | BD Krishi | Rajshahi Krishi Unnayn | Investment Corporation Of Bangladesh - ২৯. ০৩.২০১৯

A. 22 years
B. 30 years
C. 40 years
D. 32 years

View Answer	Favorite Question

Answer: Option D

Explanation:

দেওয়া আছে, 10 জন ছাত্রের গড় বয়স = 20

∴ 10 জন ছাত্রের গড় বয়স = 10 × 20

= 200 বছর

আবার, 2 জন নতুন ছাত্র আসার পর ,

12 জন ছাত্রের গড় বয়স = (20+2) বছর

∴ 12 জন ছাত্রের মোট বয়স = (12 × 22 ) বছর

নতুন ২ জন ছাত্রের মোট বয়স = (264 - 200)

= 64 বছর

∴ 2 জন ছাত্রের গড় বয়স = 64/2 = 32 বছর

2797 . The average age of a group of 10 students is 15 years . when 5 more students joined the group , the average age rise by 1 year. what is average age of the newly joined students?

A. 16
B. 17
C. 18
D. 19

View Answer	Favorite Question

Answer: Option C

Explanation:

Let the sum of 5 new student’s age is x

Then according to question,

(150 + x)/15 = 16

= )150 + x = 240

= )x = 90

Average of their ages = sum/number

= )90/5 = 18

2798 . The average age of a group of 15 employees is 24 years. If 5 more employees join the group, the average age increases by 2 years. Find the average age of the new employees.

A. 35
B. 30
C. 24
D. 32

View Answer	Favorite Question

Answer: Option D

Explanation:

Officer (Cash) -Sonali Bank | BD Development | BD Krishi Bank - 12.10.2018

A. 35years
B. 40years
C. 45years
D. 50years
E. None of these

View Answer	Favorite Question

Answer: Option B

Explanation:

3 years ago their average age was = 27 years

At present their average age = ( 27 + 3) = 30 years

At present the summation of their age = 30×3 = 90 years

Again,

5 years ago, the average age of child and wife was = 20 years

At present their average age = 20 + 5 = 25 years.

At present the summation of their age = 25×2 = 50 years

So, at present the husbands age = 90 - 50 = 40 years

2800 . The average age of husband,wife and their child 3years ago was 27 years and that of wife and the child 5years ago was 20years.The present age of husband is :

A. 35years
B. 40years
C. 45years
D. 50years

View Answer	Favorite Question

Answer: Option B

Explanation:

The total of the present ages of husband, wife and child = 3 x 27 + 3 x 3 = 90 years

The total of the present ages of wife and child = 2 x 20 + 2 x 5 = 50 years

So, the present age of the husband = 90 - 50 = 40 years

2801 . The average age of the 20 aspirants of a class is 19.2 years. After some time two more aspirants join them and then average is increased by 0.3 years. Find the difference between the age of new aspirants .

A. 12
B. 15
C. 18
D. None of these

View Answer	Favorite Question

Answer: Option D

Explanation:

জনতা ও রূপালী ব্যাংক- অফিসার ১৩.১২.২০১৯

A. 25 years
B. 30 years
C. 28 years
D. 32 years

View Answer	Favorite Question

Answer: Option B

Explanation:

মনে করি,

তিনজনের গড় বয়স ২৪

অতএব, ৩ জনের মোট বয়স ২৪*৩=৭২

দেওয়া আছে,

১ জনের বয়স ২১ বছর হলে, ২ জনের বয়স ২১*২=৪২

মনে করি,

১ জনের বয়স সর্বোচ্চ ক ববছর

প্রশ্নমতে,

২১*২+ক= ২৪*৩

বা, ৪২+ক=৭২

বা, ক=৭২-৪২

বা, ক =৩০

2803 . The average age of three persons is 30 years. If the ratio of three ages is 3 : 5 : 7. What is the age of the youngest person?

A. 18 years
B. 8 years
C. 16 years
D. 42 years

View Answer	Favorite Question

Answer: Option A

Explanation:

2804 . The average attendance of a college for the first three days of a week is 325 and first four days is 320. How many were present on the fourth day?

A. 300
B. 315
C. 305
D. 350

View Answer	Favorite Question

Answer: Option C

Explanation:

4th days attendance = (320×4 - 325×3)

= 1280 - 975 = 305

Ans.

Officer (General) |-Sonali | Janata | Bangladesh Krishi_Bangladesh Development bank ২৪.০৫.২০১৯

A. 1044
B. 2088
C. 720
D. 324

View Answer	Favorite Question

Answer: Option B

Explanation:

Total cost of 5 apples & 4 mangoes = 324 tk

Total cost of 7 apples & 8 mangoes = 720 tk

( + ) Total cost of 12 apples & 12 mangoes = 1044 tk

Total cost of 24 apples & 12 mangoes = 1044 ×2 = 2088 tk

Bangladesh Bank - Assistant Director - 2009

2791 . The average age of 15 people is 25 years. Out of them, total age of 2 people is 115 years. What is the average age of the other 13 people?

2792 . The average age of 40 employees in abranch of a bank is 35 years. When a new employee joined the bank the average age increased to 35.5 years. What is the age of the new employee?

2793 . The average age of 8 men is increased by 2 years when one of them whose age is 24 years is replaced by a woman. What is the age of the woman ?

2794 . The average age of A, B And C sis 30 years. If the difference between B's age and A's age is same as the difference between C's age and B's age . If D is 40 years older than B then what is the sum of the age B and D?

2795 . The average age of A,B,C,D and E is 40 years. The average age of A and B is 35 years and the average of C and D is 42 years. Age of E is -

2796 . The average age of a group o f10 students was 20. The average age increased by 2 years when two new students joined the group students who joined the group?

2797 . The average age of a group of 10 students is 15 years . when 5 more students joined the group , the average age rise by 1 year. what is average age of the newly joined students?

2798 . The average age of a group of 15 employees is 24 years. If 5 more employees join the group, the average age increases by 2 years. Find the average age of the new employees.

2799 . The average age of a husband, wife and their child 3 years ago was 27 years and the average age of the wife and the child 5 years ago was 20 years. What is the percent age of the husband?

2800 . The average age of husband,wife and their child 3years ago was 27 years and that of wife and the child 5years ago was 20years.The present age of husband is :

2801 . The average age of the 20 aspirants of a class is 19.2 years. After some time two more aspirants join them and then average is increased by 0.3 years. Find the difference between the age of new aspirants .

2802 . The average age of the three is 24 years. If none of them is below 21 years of age then what is the maximum age of any of them?

2803 . The average age of three persons is 30 years. If the ratio of three ages is 3 : 5 : 7. What is the age of the youngest person?

2804 . The average attendance of a college for the first three days of a week is 325 and first four days is 320. How many were present on the fourth day?

2805 . The average cost of 5 apples and 4 mangoes is 36 taka. The average cost of 7 apples and 8 mangoes is 48 taka. Find the total cost of 24 apples and 24 mangoes.

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