Question

The last page number on the textbooks of different subjects in a class is given.

$$\begin{array}{cc}\text{Subject}& \text{Page Number}\\ \text{English}& 203\\ \text{Hindi}& 203\\ \text{Maths}& 152\\ \text{Physics}& 177\\ \text{Chemistry}& 225\\ \text{Biology}& 172\\ \text{Computer Sci.}& 185\\ \text{History}& 203\\ \text{Geography}& 172\\ \text{Moral Sci.}& 267\end{array}$$

Find the probability that the last page number ends in
(i) an odd number
(ii) an even number
(iii) a multiple of 3. [4 MARKS]

Answer 1

Concept: 1 Mark
Solution:1Mark each


Number of books = 10.
Books with last page number ending in odd number = 7.
Required probability =$\frac{7}{10}$ = 0.7.
Books with last page number ending in even number = 3.
Required probability =$\frac{3}{10}$ = 0.3.
Books with last page number ending in a multiple of 3 = 3.
Required probability = $\frac{3}{10}$ = 0.3.