A box contains 90 discs, numbered from 1 to 90. If one disc is drawn

1.	A box contains 90 discs, numbered from 1 to 90. If one disc is drawn at random from box. find the probability that it bears a prime number less than 23.
Answer» No. of possible outcomes = 90 Prime numbers less than 23 = 2,3,5,7,11,,13,17,19 No. of favourable outcomes = 8 P(prime no.less than 23) = 8/90 = 4/45

A box contains 90 discs, numbered from 1 to 90. If one disc is drawn at random from box. find the probability that it bears a prime number less than 23.

Answer»

No. of possible outcomes = 90

Prime numbers less than 23 = 2,3,5,7,11,,13,17,19

No. of favourable outcomes = 8

P(prime no.less than 23) = 8/90 = 4/45

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A box contains 90 discs, numbered from 1 to 90. If one disc is drawn at random from box. find the probability that it bears a prime number less than 23.

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