A box contains `20` balls numbers of `1` to `20` .A ball is drawn at random from the box.Find the probability that the number on the ball is: (i) divisible by 3 or 5 (ii) neither divisible by 5 nor 10 (iii) an even number.

A box contains 20 balls bearing numbers - 1, 2, 3, 4, ..., 20. A ball is drawn at random from the box. What is the probability that the number on the ball is divisible by 7?

A box contains 19 balls bearing numbers 1,2,3, . .,19. a ball is drawn at random from the box. Find the probability that the number on the ball is i] a prime number ii] divisible by 3 or 5. iii] neither divisible by 5 nor by 10 iv] an even number.

A box contains 20 balls bearing numbers 1 , 2 , 3 , 4 ,__ , 20 . A ball is drawn at random from the box . What is the probability that the number on the ball is divisible by 7 ?

In a bag contains 20 cards numbered from 1 to 20. A card is drawn at random from the box. Find the probability that the number on the drawn card is (i) divisibly by 2 or 3 (ii) a prime number

In a bag contains 20 cards numbered from 1 to 20. A card is drawn at random from the box. Find the probability that the number on the drawn card is (i) divisibly by 2or 3(ii) a prime number

A box contains 7 red balls, 8 green balls and 5 white balls. A ball is drawn at random from the box. Find the probability that the ball is white.

A box contains 7 red balls, 8 green balls and 5 white balls. A ball is drawn at random from the box. Find the probability that the ball is white.

A box contains 19 balls bearing number 1,2,3,……..19 respectively. A ball is drawn at random from the box. Find the probability that the number on the ball is (i) a prime number, (ii) an even number (iii) a number divisible by 3.