Exams Questions and Answers

Q:

A letter is takenout at random from 'ASSISTANT' and another is taken out from 'STATISTICS'. The probability that they are the same letter is :

A) 35/96	B) 19/90
C) 19/96	D) None of these

Answer & Explanation Answer: B) 19/90

Explanation:

$A S S I S T A N T \to A A I N S S S T T$

$S T A T I S T I C S \to A C I I S S S T T T$

Here N and C are not common and same letters can be A, I, S, T. Therefore

Probability of choosing A = $\frac{2_{C_{1}}}{9_{C_{1}}} \times \frac{1_{C_{1}}}{10_{C_{1}}}$ = 1/45

Probability of choosing I = $\frac{1}{9_{C_{1}}} \times \frac{2_{C_{1}}}{10_{C_{1}}}$ = 1/45

Probability of choosing S = $\frac{3_{C_{1}}}{9_{C_{1}}} \times \frac{3_{C_{1}}}{10_{C_{1}}}$ = 1/10

Probability of choosing T = $\frac{2_{C_{1}}}{9_{C_{1}}} \times \frac{3_{C_{1}}}{10_{C_{1}}}$ = 1/15

Hence, Required probability = $\frac{1}{45} + \frac{1}{45} + \frac{1}{10} + \frac{1}{15} = \frac{19}{90}$

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Filed Under: Probability
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Q:

Join Our Whatsapp Group For Competitive Exams - Sawaal

Answer

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Q:

In a class of 78 students 41 are taking French, 22 are taking German. Of the students taking French or German, 9 are taking both courses. How many students are not enrolled in either course?

A) 6	B) 12
C) 24	D) 18

Answer & Explanation Answer: C) 24

Explanation:

You could solve this by drawing a Venn diagram. A simpler way is to realize that you can subtract the number of students taking both languages from the numbers taking French to find the number taking only French. Likewise find those taking only German. Then we have:Total = only French + only German + both + neither

78 = (41-9) + (22-9) + 9 + neither.

Not enrolled students = 24

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Filed Under: Average
Exam Prep: GRE

20 22631

Q:

Bhutan’s national language is known as ___________.

A) Dzongkha	B) Khengkha
C) Tshanglakha	D) Lhotshamkha

Answer & Explanation Answer: A) Dzongkha

Explanation:

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Filed Under: Honours and Awards
Exam Prep: Bank Exams

1 22619

Q:

The smallest Union Territory of India is

A) Lakshadweep	B) Pondicherry
C) Daman and Diu	D) Dadar and Nagar Haveli

Answer & Explanation Answer: A) Lakshadweep

Explanation:

Lakshadweep has an area of only about 32 sq km.

The_smallest_Union_Territory_of_India_is1554209119.jpg image

The area of Pondicherry, Daman and Diu and Dadar and Nagar Haveli are about 492 sq km and 491 sq km respectively.

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Filed Under: Indian Geography
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40 22610

Q:

In what time will Rs. 1000 become Rs. 1331 at 10% per annum compounded annually?

A) 1years	B) 2years
C) 3years	D) 4years

Answer & Explanation Answer: C) 3years

Explanation:

Principal = Rs. 1000; Amount = Rs. 1331; Rate = 10% p.a. Let the time be n years. Then,
[ 1000 (1+ (10/100))^n ] = 1331 or (11/10)^n = (1331/1000) = (11/10)^3
n = 3 years

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Filed Under: Compound Interest
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Job Role: Bank PO

39 22603

Q:

USB is which type of storage device?

A) Tertiary	B) Secondary
C) Primary	D) Auxillary

Answer & Explanation Answer: B) Secondary

Explanation:

USB - Universal Serial Bus is a secondary type of storage device which is used in all computers, laptops, mobiles...

USB1533034422.jpg image

It is a plug-and-play portable storage device that uses flash memory and is lightweight enough to attach to a keychain.

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Filed Under: Computer
Exam Prep: AIEEE , Bank Exams , CAT
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58 22585

Q:

An assertion (A) and a reason(R) are given below.

Assertion (A) : Some land outside the forest area is not fertile.

Reason (R) : Extensive cattle grazing leads to loss of soil fertility.

A) Both A and R are true and R is the correct explanation of A	B) Both A and R are true, but R is not the correct explanation of A
C) A is true, but R is false	D) A is false, but R is true

Answer & Explanation Answer: B) Both A and R are true, but R is not the correct explanation of A

Explanation:

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Filed Under: Statement and Conclusions
Exam Prep: Bank Exams

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