Question

A box contains cards numbered 11 to 123. a card is drawn at random from the box. find the probability that the number on the drawn card is (i) a square number (ii) a multiple of 7 ans. (

Answer 1

Total number of cards = 123-10 = 113
(i) Favourable outcome = 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121.
Probability of getting a square number will be = 11/113
(ii) favourable outcome = 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98, 105, 112, 119.
Probability of getting a multiple of 7 will be = 17/113
Hope this helps :-)

Answer 2

i) P (a square no.) = 8/113

ii) P (a multiple of 7) = 16/113

Hope you understood. .....