NDA 2018 Paper 1 | Probability Question 70 | Mathematics

A committee of three has to be chosen from a group of 4 men and 5 women. If the selection is made at random, what is the probability that exactly two members are men?

$${5 \over {14}}$$

$${1 \over {21}}$$

$${3 \over {14}}$$

$${8 \over {21}}$$

NDA 2019 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

A bag contains 20 books out of which 5 are defective. If 3 of the books are selected at random and removed from the bag in succession without replacement, then what is the probability that all three books are defective?

0.009

0.016

0.026

0.047

NDA 2019 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

A coin is biased so that heads comes up thrice as likely as tails. For three independent tosses of a coin, what is the probability of getting at most two tails?

0.16

0.48

0.58

0.98

NDA 2019 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

If a coin is tossed till the first head appears, then what will be the sample space?

{H}

{TH}

{T, HT, HHT, HHHT, ...........}

{H, TH, TTH, TTTH, .............}

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Questions Asked from Marks 2.5

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