Question

5
A bookshelf contains 40 books marked with
numbers 1 to 40. If one book is drawn from
this shelf at random, then the probability that
6.
the number on the book is a perfect square is

A)3/2
B)2/15
C)1/10
D)1/3
​

Answer 1

Answer:

n(s)=40

E= perfect square

n(E)=4,9,16,25,36=5

p(E)=n(E)/n(s)=5/40=1/8....

Answer 2

Total no. of perfect squares (1,4,9,16,25,36)=6

PROBABILITY=NO. OF FAVOURABLE OUTCOMES/TOTAL NUMBER OF OUTCOMES

PROBABILITY=6/40=3/20