1846 . If four fair coins are flipped, what is the probability that they all will come up heads?

A. 3/16
B. 1/4
C. 1/8
D. 1/16

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Answer: Option D

Explanation:

When you flip a fair coin, there are 2 possible outcomes: heads (H) or tails (T). Each outcome is equally likely, so the probability of getting heads on a single coin flip is 1/2.

To find the probability of getting all heads when flipping four fair coins, you need to calculate the probability of getting heads on each coin flip and then multiply these probabilities together because each coin flip is independent of the others.

P(All Heads) = P(Head on Coin 1) * P(Head on Coin 2) * P(Head on Coin 3) * P(Head on Coin 4)

Since each coin flip has a 1/2 probability of landing heads:

P(All Heads) = (1/2) * (1/2) * (1/2) * (1/2) = (1/16)

So, the probability of getting all heads when flipping four fair coins is 1/16. Therefore, the answer is 1/16

সমন্বিত ৭ ব্যাংক || সিনিয়র অফিসার-05-11-2021 ||

A. 5, 12, 13
B. 8,15, 17
C. 3, 4, 5
D. 12, 15, 18

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Answer: Option D

Explanation:

12²+15²≠18²

So, it's not possible to be a right triangle

1848 . If $f (x) = x^{2} + \frac{1}{x - 1} - 1$ , then which of the following is correct?

A. $f (0) = \infty$
B. $f (1) = - 1$
C. $f (1) = 0$
D. $f (- 1) = - 1$

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Answer: Option D

Explanation:

Bangladesh Bank - Assistant Director - 2015

A. R
B. R, S
C. S, T
D. R,S,T

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Answer: Option B

Explanation:

1850 . If in a certain language, POPULAR is coded as QPQVMBS. Which word would be coded as GBNPVT?

A. FARMER
B. FRAMES
C. FAMOUS
D. FAMOUS

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Answer: Option C

Explanation:

Hints: Every letrer is replaced by the letrer immediately following it. using this trick, FAMOUS would be written as GBNPVT.

1851 . If income of Rahim is 25% more than that of Karim, Then income of Karim will be how much less than that of Rahim?

A. 10%
B. 15%
C. 20%
D. 25%

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Answer: Option C

Explanation:

let, Karim's income is 100 tk

as,Rahim's income is 25% more

so, Rahim's income is 125 tk

income of Karim will be how much less than that of Rahim by = (125 - 100)/125 * 100% = 20%

ans: 20%

1852 . If it takes 4 hours to dig a hole by 50 workers, how long should it take to dig the same hole by 30 workers?

A. 2 hours 24 minutes
B. 6 houres 12 minutes
C. 5 houres 12 minutes
D. 6 hours 40 minutes

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Answer: Option D

Explanation:

Here, 4 hours = 240 minutes

Now, 50 workers can dig the hole in 240 minutes

So, 30 workers can dig the hole in 240×50/30 = 400 minutes = 6 hours 40 minutes

1853 . If it takes 50 workers 4 hours to dig a hole, how long should it take 30 workers to dig the same hole?

A. 5 hours 12 minutes
B. 6 hours 40 minutes
C. 2 hours 24 minutes
D. 6 hours 12 minutes

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Answer: Option B

Explanation:

Here, 4 hours = 240 minutes

Now, 50 workers can dig the hole in 240 minutes

So, 30 workers can dig the hole in 240×50/30 = 400 minutes = 6 hours 40 minutes

1854 . If k is divisible by 2, 3 and 15, which of the following is also divisible by these numbers?

A. k + 5
B. k + 15
C. k + 20
D. k + 30

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Answer: Option D

Explanation:

1855 . If k is divisible by 3, 9 and 12, which of the following is also divisible by these numbers?

A. k + 15
B. k + 35
C. k + 45
D. k + 72

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Answer: Option D

Explanation:

72 is divisible by 3, 9 and 12. Therefore, if 'k' is divisible by those numbers, (k + 72) will also be divisible by them.

1856 . If kabir loses 8 pounds , he will weigh twice as much as his sister, Together they now weigh 278 pounds What is Kabir's present weight , in pounds?

A. 147
B. 188
C. 135
D. 139

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Answer: Option B

Explanation:

ধরি, কবিরের বর্তমান ওজন = x পাউন্ড

কবিরের বোনের বর্তমান ওজন = ( 278 - x) পাউন্ড

প্রশ্নমতে, (x - 8) = 2( 278 - x)

x - 8 = 556 - 2x

3x = 564/3

x = 188

1857 . If length and width of a rectangular plot were each increased by 20%, what would be the percentage increase in the area of the plot?

A. 20%
B. 24%
C. 36%
D. 44%

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Answer: Option D

Explanation:

Short - cut Formula :

A + B + AB/100

20 + 20 ( 20× 20) / 100 = 44.

সমন্বিত ব্যাংক অফিসার (ক্যাশ) || (02-06-2023)

A. if m is odd then pis odd
B. if m is odd p is even
C. if m is even p is even
D. is p is even p is odd

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Answer: Option A

Explanation:

Both A and C are correct.
A→ 1+1=2
C→2+2=4

Sonali Bank Ltd. Senior Officer Recruitment 01.06.2018

A. 10/M
B. 100/M
C. 1000/M
D. M

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Answer: Option D

Explanation:

m men can do the job in 10 days

1 man can do the job in 10 x m days

10 men can do the job in (10 x m)/10 = m days.

1860 . If m men can do a job in 10 days, how many days it will take for 10 men to complete the job assuming that they work at the same rate?

A. m
B. 10/m
C. 100m
D. 10m

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Answer: Option A

Explanation:

m men can do the job in 10 days

1 man can do the job in 10 x m days

10 men can do the job in (10 x m)/10 = m days.

1846 . If four fair coins are flipped, what is the probability that they all will come up heads?

1847 . If four triangles are constructed with sides of the length indicated below, which of the following triangles will not be a right triangle ?

1849 . If H appears on page 25 , which one of the following is a complete and accurate list of all poems any one of which could appear on page 20?

1850 . If in a certain language, POPULAR is coded as QPQVMBS. Which word would be coded as GBNPVT?

1851 . If income of Rahim is 25% more than that of Karim, Then income of Karim will be how much less than that of Rahim?

1852 . If it takes 4 hours to dig a hole by 50 workers, how long should it take to dig the same hole by 30 workers?

1853 . If it takes 50 workers 4 hours to dig a hole, how long should it take 30 workers to dig the same hole?

1854 . If k is divisible by 2, 3 and 15, which of the following is also divisible by these numbers?

1855 . If k is divisible by 3, 9 and 12, which of the following is also divisible by these numbers?

1856 . If kabir loses 8 pounds , he will weigh twice as much as his sister, Together they now weigh 278 pounds What is Kabir's present weight , in pounds?

1857 . If length and width of a rectangular plot were each increased by 20%, what would be the percentage increase in the area of the plot?

1858 . if m and p are positive integers and (m+p) is even which is the must be true ?

1859 . If M men can do a job in 10 days, how long will it take for 10 men to complete the task, assuming that they work at the same rate?

1860 . If m men can do a job in 10 days, how many days it will take for 10 men to complete the job assuming that they work at the same rate?

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