Question

two digit numbers using the digits 0 1 2 3 4 5 without repeating the digits find the probability of each of the event.
1.the number formed is divisible by 3.
2. the number formed is a perfect square.

Answer 1

Total Number taking two digits together = 5 x 4

                                                         = 20

For odd number unit digit should be 3,5,7,9

       Total possible number = 16

           Probability = 16/20 = 4/5 = 0.8

(ii) Number is divisible by 5 only when unit place is 5 so only total five number possible P= 5/20 = 1/4 = 0.25

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