Question

A box contains cards numbered from 1 to 90 . If one card is drawn at random from the box . The probability that it bears a two digit number is

Answer 1

Step-by-step explanation:

Sample space = {1,2,3,4,5,6,7,8,.......90}

(i) Two digit number

Outcomes of two digit number = 80

Therefore

Probability = 80/90

= 8/9

(ii) a perfect square

Outcomes = {4,9,16,25,36,49,64}

Therefore

Probability = 7/80

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