A box contains 90 discs which are numbered from 1 to 90 If one disc is drawn at random from the box ...

Question

A box contains 90 discs which are numbered from 1 to 90 If one disc is drawn at random from the box find the probability that it bears a twodigit number

Accepted Answer

The total numbers of discs 50 PE Number of favourable outcomes Total number of outcomes Total number of discs having two digit numbers 81 Since 1 to 9 are single digit numbers and so total 2 digit numbers are 909 81 P bearing a twodigit number 8190 910 09

NCERT Solutions Class 10 Mathematics Solutions for Probability - Exercise 15.1 in Chapter 15 - Probability