3466 . There are 3 doors to a lecture room. In how many ways can a lecturer enter the room from one door and leave from another door ?

A. 1
B. 3
C. 6
D. 9

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Answer: Option C

Explanation:

Ways : (3×2) = 6

Or, ways: 3! = 6

Ans: 6.

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সমন্বিত ১০ ব্যাংক ও আর্থিক প্রতিষ্ঠান || সিনিয়র অফিসার (10-11-2023)

3467 . There are 3 green, 4 orange and 5 white colour bulbs in a bag. If a bulb is picked at random, what is the probability of having either a green green or a white bulb?

A. $\frac{3}{4}$
B. $\frac{2}{5}$
C. $\frac{1}{3}$
D. $\frac{2}{3}$

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Answer: Option D

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জনতা ব্যাংক || অফিসার (আরসি) (28-06-2024) || 2024

3468 . There are 4 cows and 4 goats are in a field. If two of the animals are selected at random, what is the probability that both will be cows?

A. $\frac{1}{2}$
B. $\frac{3}{7}$
C. $\frac{3}{4}$
D. $\frac{3}{14}$

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Answer: Option D

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Standard Bank Plc || Trainee Assistant Officer (15-03-2025) || 2025

A. 1/2
B. 3/7
C. 3/4
D. 3/14
E. None of these

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Answer: Option D

Explanation:

মোট লোক সংখ্যা = (৪ + ৪) জন = ৮ জন

৪ জন হতে ১ জন মহিলা হওয়ার সম্ভাবনা = ৪/৮ = ১/২

বাকি ৩ জন মহিলা ও ৪ জন পুরুষ হতে ১ জন মহিলা হবার সম্ভাবনা = ৩/৭

দুইজন মহিলা হবার সম্ভাবনা = ১/২ × ৩/৭ = ৩/১৪

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3470 . There are 40 members in a club; 9/20 of the members are engineers; and 4/5 of the members are male. What can be the possible minimum number of male engineers?

A. 10
B. 12
C. 16
D. 20

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Answer: Option A

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3471 . there are 5 red and 3 black in a bag probability of drawing a black ball is

A. 5/8
B. 1/2
C. 3/8
D. 1/4

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Answer: Option C

Explanation:

মোট বলের সংখ্যা = 5 + 3 = 8 টি

কালো বলের সংখ্যা = 3 টি

একটি কালো বল উঠার সম্ভাব্যতা = 3/8

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Sonali Bank Ltd. Senior Officer Recruitment 01.06.2018

A. 1/2
B. 3/7
C. 1/4
D. 3/14

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Answer: Option D

Explanation:

The probability that two women are selected is as follows:

4/8 x 3/7 = 1/2 x 3/7 = 3/14.

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3473 . There are 8 more men than women on board of directors of a company. If there are 20 members on the board, how many are men ?

A. 6
B. 8
C. 12
D. 14

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Answer: Option D

Explanation:

Let, women = x

Men = x + 8

x + x + 8 = 20

2x = 12

x = 6

Women = x = 6

Men = 6 + 8 = 14 , Men = 20 - 6 = 14.

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Bangladesh Bank - Assistant Director - 2010

A. 432
B. 450
C. 464
D. 448

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Answer: Option A

Explanation:

900 জন এর 4% = 900 x .04 = 36
36জন চলে যাওয়ায় বাকি থাকে  = 900 - 36 = 864
এবং বাকি 864এর 50% girls  = 864 x .50 = 432

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3475 . There are deer and peacocks in a zoo. The total number of their heads is 80 and the total number of their legs is 200. How many peacocks are there?

A. 20
B. 30
C. 50
D. 60
E. None of these

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Answer: Option D

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3476 . There are n students in a school . If r% among the students are 12 years or younger, which of the following expressions represents the number of students who are solder than 12?

A. n(1-r)
B. n ( 100-r) /100
C. n(1-r)/100
D. 100(1-r)n

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Answer: Option B

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3477 . There are total 40 dishes of rice and meat. If the ratio of number of rice dish to the number of meat dish is 3 to 2 , how many meat dishes are there?

A. 16
B. 24
C. 8
D. 32

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Answer: Option A

Explanation:

40/(3+2)=8

So, meat dishes=8×2=16

(ans)

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Sonali &amp- Janata Bank Ltd. Senior Officer (IT/ICT) 08.06.2018

A. 20
B. 80
C. 100
D. 200
E. None of these

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Answer: Option C

Explanation:

Let, the no of students in room A and B be x and y

Then, x - 10 = y + 10

and, x + 20 = 2 ( y - 20)

Solving, x = 100, y = 80

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3479 . There are two numbers such that the sum of twice the first and thrice the second is 39. While the sum of thrice first and twice the second is 36. The larger of the two is :

A. 6
B. 8
C. 9
D. 12

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Answer: Option C

Explanation:

ধরি, সংখ্যা দুটি x ও y

2x + 3y = 39....... (1)

3x + 2y = 36........... (2)

(1) × 3 - (2) × 2

6x + 9y = 117

6x + 4y = 72

5y = 45

y = 9

x = 39 - 27 /2 = 6

বড় সংখ্যাটি 9

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3480 . There are two squares S1 and S2 The ratio of their areas is 4 : 25. If the side of S1 is 6 cm. What is the side of S2 ?

A. 20 cm
B. 5 cm
C. 15 cm
D. 12 cm

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Answer: Option C

Explanation:

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জনতা ব্যাংক || অফিসার (আরসি) (28-06-2024) || 2024

3466 . There are 3 doors to a lecture room. In how many ways can a lecturer enter the room from one door and leave from another door ?

3469 . There are 4 women and 4 men sitting in a waiting room for job interview. If two of the applicants are selected at random, what is the probalility that both will be women?

3470 . There are 40 members in a club; 9/20 of the members are engineers; and 4/5 of the members are male. What can be the possible minimum number of male engineers?

3471 . there are 5 red and 3 black in a bag probability of drawing a black ball is

3472 . There are 8 job applicants sitting in waiting room; 4 women and 4 men. If two of the applicants are selected at random, what is the probability that both will be women?

3473 . There are 8 more men than women on board of directors of a company. If there are 20 members on the board, how many are men ?

3474 . There are 900 students in a school. 4% of them left the school and 50% of the remaining are girls. How many girls remained in the school?

3475 . There are deer and peacocks in a zoo. The total number of their heads is 80 and the total number of their legs is 200. How many peacocks are there?

3476 . There are n students in a school . If r% among the students are 12 years or younger, which of the following expressions represents the number of students who are solder than 12?

3477 . There are total 40 dishes of rice and meat. If the ratio of number of rice dish to the number of meat dish is 3 to 2 , how many meat dishes are there?

3478 . There are tow examinations rooms A and B. If 10 students are sent from A to B, then the number of students in each room is the same . If 20 candidates are sent from B to A, then the number of students in a is double the number of students in B. what is the number of students in room A?

3479 . There are two numbers such that the sum of twice the first and thrice the second is 39. While the sum of thrice first and twice the second is 36. The larger of the two is :

3480 . There are two squares S1 and S2 The ratio of their areas is 4 : 25. If the side of S1 is 6 cm. What is the side of S2 ?

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