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 perfect square number.
The total numbers of discs = 50
P(E) = (Number of favourable outcomes/ Total number of outcomes)
Total number of perfect square numbers = 9 (1, 4, 9, 16, 25, 36, 49, 64 and 81)
P (getting a perfect square number) = 9/90 = 1/10 = 0.1
Lido
Courses
Quick Links
Terms & Policies
Terms & Policies