Probability Questions

A box contains 12 balls out of which X are black. If 6 more black balls are put in the box,then the probability of drawing a black ball is now double of what it was before. Find X.

If P(E) = 0.07, then what is the probability of ‘not E’?

A bag has 5 white marbles, 8 red marbles and 4 purple marbles. If we take a marble randomly, then what is the probability of not getting purple marble?

A dice is thrown in the air. The probability of getting odd numbers is

If we throw two coins in the air, then the probability of getting both tails will be:

If two dice are thrown in the air, the probability of getting sum as 3 will be

A card is drawn from the set of 52 cards. Find the probability of getting a queen card.

Two dice are thrown simultaneously. The probability of getting a sum of 9 is:

100 cards are numbered from 1 to 100. Find the probability of getting a prime number.

A bag contains 5 red balls and some blue balls .If the probability of drawing a blue ball is double that of a red ball, then the number of blue balls in a bag is: