Q. 30

# A box contains 90

(i) 10,11,12…90 are two digit numbers. There are 81 numbers. So,

Probability of getting a two-digit number

= 81/90 = 9/10

(ii)1, 4, 9,16,25,36,49,64,81 are perfect squares. So, Probability of getting

a perfect square number = 9/90 = 1/10

(iii) 5, 10,15….90 are divisible by 5. There are 18 outcomes. So, probability

of getting a number divisible by 5 = 18/90 = 1/5

OR

(i) Probability of getting A king of red colour.

P (King of red colour) = 2/52 = 1/26

(ii) Probability of getting A spade

P ( a spade) = 13/52 = 1/4

(iii) Probability of getting The queen of diamonds

P ( a the queen of diamonds) = 1/52

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