5896 . The average of several exam scores is 80. One make-up exam was given. Included with the other scores, the new average was 84. If the score on the make up exam was 92, how many total exams were give?

A. 3
B. 2
C. 4
D. 5

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Answer: Option A

Explanation:

বাংলাদেশ পেট্রোলিয়াম ইনস্টিটিউট (সহকারী পরিচালক) 18-12-2020

A. 6
B. 7
C. 8
D. 9

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Answer: Option C

Explanation:

5898 . The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?

A. 10
B. 8
C. 12
D. 15

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Answer: Option C

Explanation:

Total mark of first 15 students = 15 * 10 = 150

Total mark of first 10 students = 15 * 10 = 150

Total mark of 25 students = 150 + 150 = 300

Average = 300 / 25 = 12

বিসিআইসি | সহকারী প্রকৌশলী (কমার্শিয়াল) | 10-12-2021

A. 35
B. 40
C. 50
D. None

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Answer: Option B

Explanation:

Let's denote the present ages of the husband, wife, and child as H, W, and C, respectively.

According to the given information:

Four years ago, the average age of the husband, wife, and child was 27 years. So, (H - 4 + W - 4 + C - 4) / 3 = 27.

Five years ago, the average age of the wife and child was 20 years. So, (W - 5 + C - 5) / 2 = 20.

We can simplify these equations:

1. (H + W + C - 12) / 3 = 27.

2. (W + C - 10) / 2 = 20.

Now, let's solve this system of equations:

From equation 2, we can express W + C as 2 * 20 + 10 = 50.

Substitute this value into equation 1:

(H + 50 - 12) / 3 = 27.

H + 38 = 81.

H = 81 - 38.

H = 43.

So, the present age of the husband is 43 years.

তিতাস গ্যাস ট্রান্সমিশন অ্যান্ড ডিস্ট্রিবিউসন কো. লি.-সহকারী ব্যবস্থাপক-08-10-2021

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

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Answer: Option D

Explanation:

Total age of 10 students = 20×10 = 200
Total age of 12students = (20 + 2)12 = 264
∴ age of 2 new students = 264 - 200 = 64
average = 64/2 = 32

পল্লী কর্ম সহায়ক ফাউন্ডেশন সহকারী ব্যবস্থাপক ০২. ০৮.২০১৯

A. 39
B. 40
C. 45
D. 49

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Answer: Option A

Explanation:

C ইউনিট ব্যবসা শিক্ষা (২০২৩-২০২৪) || (09-03-2024) || চট্টগ্রাম বিশ্ববিদ্যালয়

A. 24
B. 25
C. 26
D. 28

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Answer: Option A

Explanation:

The average of 6 numbers is 25
The Total of 6 numbers is = 25×6 = 150
The average of 3 numbers is 22
The Total of 3 numbers is = 22×3 = 66
The Total of (6 + 3) = 9 numbers is = (150 + 66) = 216

The average of 9 numbers is = 216/9 = 24

কর্ণফুলী গ্যাস ডিস্ট্রিবিউশন কোম্পানী লিমিটেড || সহকারী ব্যবস্থাপক (সাধারণ) (04-12-2021)

A. (x + 5)(x + 5)
B. (x - 5)(x - 5)
C. (x + 5)(x - 5)
D. x(x - 25)

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Answer: Option C

Explanation:

The area of a rectangular classroom is given as x² - 25.

To find the length and width of the room, we can look for factors of x² - 25 that can represent the length and width.

x² - 25 can be factored as the difference of squares:

x² - 25 = (x + 5)(x - 5)

সহকারী পরিচালক(AD) -12.11.2021

A. 54 °
B. 81 °
C. 135 °
D. 216 °

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Answer: Option D

Explanation:

দেওয়া আছে পঞ্চভুজের 5 টি কোণের অনুপাত= 9:10:12:14:15 অনুপাতগুলোর যোগফল=9+10+12+14+15=60 আবার, আমরা জানি পঞ্চভুজের 5 টি কোণের সমষ্টি =560° ∴ সবচেয়ে বড় ও সবচেয়ে ছোট কোণদ্বয়ের সমষ্টি = \frac{9 + 15}{60} ×540° = \frac{24}{60} \times 540 ° = 216 °

জীবণ বীমা কর্পোরেশন (সহকারী ম্যানেজার) 16-10-2020

A. 50ডিগ্রী
B. 60ডিগ্রী
C. 70ডিগ্রী
D. 80ডিগ্রী
E. None of them

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Answer: Option B

Explanation:

Sonali- Janata- Agrani &amp- Rupali Bank Ltd. Senior Officer Recruitment 14.03.2008

5906 . The reciprocal of p/n is n/p and vice. Which of the following is the reciprocal of $3 / \sqrt{2}$

A. $\sqrt{2} / 3$
B. $2 / \sqrt{3}$
C. $4 \sqrt{3} / 3$
D. $12 / 9$

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Answer: Option B

Explanation:

5907 . the price of sugar increases by 32%. A family reduces its consumption so that the expenditure of the sugar is up only by 10%. If the total consumption of the sugar before the price rise was 10 kg per month, then the consumption of sugar per month at present (in kg) is :

A. $8 \frac{1}{3}$
B. $8 \frac{1}{2}$
C. $8 \frac{3}{4}$
D. $9$

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Answer: Option A

Explanation:

5908 . The price of rice has increased by 60%. In order to restore the original price, the new price must be reduced by--

A. $33^{\frac{1}{3}} %$
B. $45 %$
C. $40 %$
D. $37^{\frac{1}{2}} %$

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Answer: Option D

Explanation:

Let price of rice is 100 Reducing % = 60/160 x 100 = 300/8 = 37.5 Ans: 37.5%

5909 . The price of an article has been reduced by 25%. In order to restore the original price the new price must be increased by--

A. $33 \frac{1}{3} %$
B. $33 %$
C. $25 %$
D. $30 %$

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Answer: Option A

Explanation:

5910 . The difference between $\sqrt{150}$ and $\sqrt{54}$ is _____

A. $2 \sqrt{6}$
B. $16 \sqrt{16}$
C. $9 \sqrt{6}$
D. None of these

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Answer: Option A

Explanation:

\sqrt{150} - \sqrt{54} = 5 \sqrt{6} - 3 \sqrt{6} = 2 \sqrt{6}

5896 . The average of several exam scores is 80. One make-up exam was given. Included with the other scores, the new average was 84. If the score on the make up exam was 92, how many total exams were give?

5897 . The average of a, b, c is 6 and a - b = 4, ab = 21, what is the value of c?

5898 . The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?

5899 . The average age of husband wife and their child 4 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is:

5900 . The average age of a group of 10 students was 20. The average age increased by 2 years when two new students joined the group. What is the average age of the group. What is the average age of the two new students who joined the group?

5901 . The average age of 24 students in a class is 14. If the teacher's age is included, the average increases by 1. What is the age of teacher?

5902 . The avarage of 6 numbers in 25. If 3 more, with an average of 22 are added to these numbers, what will be the average of the combined 9 numbers?

5903 . The area of a rectangular classroom is x2 - 25 Which of the following binomials could represent the length and the width of the room?

5904 . The angles of a pentagon are in ratio 9 : 10 : 12 : 14 : 15. What is the sum of measures of the smallest and largest angles?

5905 . The 2nd angle of a right triangle is 30 ডিগ্রী. Then what is the 3rd angle?

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