A box contain cards numbered from 23 to 147 .A card is drawn at random from the box . find the probability that the number on the card is 1) a multiple of 3or 4 2) a prime no.

Question

A box contain cards numbered from 23 to 147 .A card is drawn at random from the box . find the probability that the number on the card is

1) a multiple of 3or 4

2) a prime no.

Answer 1

Presumably there are 125 cards in the deck, numbered sequentially from 23 to 147.

In order to answer the first question you need to count the numbers which are a multiple of either 3 or 4. The probability required is the number divided by 125.

To answer the 2nd question you need to count the number of primes between 23 and 146 and divide by 125.