R K Bansal Solutions for Exercise 1: EXERCISE

A man tosses two different coins (one of $₹2$and another of$₹5$) simultaneously. What is the probability that he gets at most one head?

Three coins are tossed together. Write all the possible outcomes. Now, find the probability of getting all tails,

Three coins are tossed together. Write all the possible outcomes. Now, find the probability of getting at least one tail.

Two dice are thrown simultaneously. What is the probability that $4$will not come up either time ?

Two dice are thrown simultaneously. What is the probability that :  

$4$will come up atleast once?

Cards marked with numbers $1, 2, 3, 4,.......20$ are well shuffled and a card is drawn at random. What is the probability that the number on the card is a prime number?

Cards marked with numbers $1, 2, 3, 4,........20$ are well shuffled and a card is drawn at random. What is the probability that the number on the card is divisible by $3$?

Cards marked with numbers $1, 2, 3, 4,......20$ are well shuffled and a card is drawn at random. What is the probability that the number on the card is a perfect square ?