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Subject: Maths, asked on on 17/1/13

50-32-12 not equal to 2

A die is rolled 50 times such that a prime number appeared on it 32 times and composite number appeared 12 times.

What is the probability of getting the number 1 on the die?

A :

B :

C :

D :

Number of times die is rolled = 50

Number of times prime number appeared = 32

Number of times composite number appeared = 12

It is known that:

2, 3, and 5 are prime.

4 and 6 are composite.

1 is neither prime nor composite.

∴ Number of times 1 appeared = 50 − 32 − 12 = 2

Probability is given by:


∴ Required probability

Thus, the probability of getting 1 is.

The correct answer is C.

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Subject: Maths, asked on on 25/12/15
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