1.

An integer is chosen at random between 1 and 100. Find the probability that it is : (i) divisible by 8. (ii) not divisible by 8.

Answer»

Total number of outcomes = 98

(i) Favourable outcomes are 8,16,24,..., 96, i.e.,12

∴Probability (integer is divisible by 8) = 12/98 or 6/49

(ii) Probability (integer is not divisible by 8) = 1-6/49

= 43/49



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