Question

If on the average rain falls on twelve days in every thirty, find the probability that the firstthree days of a given week will be fine and the remaining wet, ​

Answer 1

Answer:

Ans) Clearly the probability of rain falling for each day

is = 12/30 = 2/5.Therefore probability of rain not

falling on any given day is = 1 - ( 2/5) =3/5.

Hence probability of rain not falling on first four day

of a week = ( 3/5 ) ^4 =81/625 = 0.1296 = 12.96% Ans

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