Probability-XI

In a group of 10 outstanding slaidents in a school, there are 6 boys and 4 girls, 3 students are to be selected out of these at random for a debate competition. Find the probability that one is boy and 2 are girls.

From a well-shuffled pack of 52 cards, a card is drawn at random. Find the probability that it is either a heart or a queen.

From a well-shuffled pack of 52 cards, a card is drawn at random. Find the probability that either it is an ace of red colour or a card of black colour.

A committee of 5 Principals is to be selected from a group of 6 Gent Principals and 8 Lady Principals. If the selection is made randomly, find the probability that there are 3 Lady Principals and 2 Gent Principals.

In a class of 25 students with ro ll numbers 1 to 25, a student is picked up at random to answer a question. Find the probability that the rol 1 number of the selected student is either a multiple of 5 or 7.

One card is drawn from a set of 17 cards numbered 1 to 17. Find the probability that the number is divisible by 3 or 7.