Question

A box contains cards numbered 1to90.A card is drawn at random from the box. Find the probability that the number on drawn card is 1.perfectsquare number 2. multiple of seven

Answer 1

Numbers which are perfect square between 1 to 90=1,4,9,16,25,36,49,64,81
Total no.of these outcomes=9
(i)Probability of a number getting a perfect square=9/90=0.1
Numbers which are multiple of 7 between 1 to 90=7,14,21,28,35,42,49,56,63,70,77,84
Total no.of these outcomes=12
(ii)Probability of a number getting multiples of 7=12/90=0.133