J P Mohindru and Bharat Mohindru Solutions for Chapter: Probability, Exercise 1: EXERCISE

A bag contains tickets having numbers $11, 12, 13, ....30.$ A ticket is drawn out from the bag at random. Find the probability that the number on the drawn ticket is a multiple of $7$.

A bag contains tickets having numbers $11, 12, 13, ....30.$ A ticket is drawn out from the bag at random. Find the probability that the number on the drawn ticket is greater than $15$ and a multiple of $5$.

A bag contains cards which are numbered from $2$ to $90$. A card is drawn at random form the bag. Find the probability that it is a two digit number.

A bag contains cards which are numbered from $2$ to $90.$ A card is drawn at random form the bag. Find the probability that it is a number which is a perfect square.

Seventeen cards numbered $1, 2, 3, 4, \dots , 16, 17$ are put in a box and mixed thoroughly. One person draws a card from the box. Find the probability that the number on the card is odd in fractional form.

Seventeen cards numbered $1, 2, 3, 4, \dots , 16, 17$ are put in a box and mixed thoroughly. One person draws a card from the box. Find the probability that the number on the card is a prime number.

Seventeen cards numbered $1, 2, 3, 4, \dots , 16, 17$ are put in a box and mixed thoroughly. One person draws a card from the box. Find the probability that the number on the card is divisible by $3$ in fractional form.

Seventeen cards numbered $1, 2, 3, 4, \dots , 16, 17$ are put in a box and mixed thoroughly. One person draws a card from the box. Find the probability that the number on the card is divisible by $2$ and $3$ both.