NDA 2015 Paper 2 | Probability Question 9 | Mathematics

A problem in Statistics is given to three students A, B and C whose chances of solving it independently are $${1 \over 2}$$, $${1 \over 3}$$ and $${1 \over 4}$$, respectively. The probability that the problem will be solved, is

$${1 \over 12}$$

$${11 \over 12}$$

$${1 \over 2}$$

$${3 \over 4}$$

NDA 2015 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

An insurance company insured 2000 scooter drivers, 4000 car drivers and 6000 truck drivers. The probabilities of an accident involving a scooter driver, car driver and a truck driver are 0.01, 0.03 and 0.15, respectively. One of the insured persons meets with an accident. The probability that the person is a scooter driver, is

$${1 \over {52}}$$

$${3 \over {52}}$$

$${15 \over {52}}$$

$${19 \over {52}}$$

NDA 2015 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

A coin is tossed 5 times. The probability that tail appears an odd number of times, is

$${1 \over 2}$$

$${1 \over 3}$$

$${2 \over 5}$$

$${1 \over 5}$$

NDA 2015 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

What is the probability that the sum of any two different single digit natural numbers is a prime number?

$${5 \over {27}}$$

$${7 \over {18}}$$

$${1 \over {3}}$$

None of these

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