Two numbers probable

Asked by SSHHII | 15th Jul, 2009, 11:14: PM

Expert Answer:

the total number of pairs =10

because

(1,2),(1,3),(1,4),(1,5)

(2,3)(2,4),(2,5)

(3,4),(3,5)

(4,5)

out of that the pairs with consecutive numbers are 4

because(1,2),(2,3),(3,4),(4,5)

so reqd prob is

4/10=2/5

Answered by  | 16th Jul, 2009, 08:40: AM

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