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Mark the correct alternative in the following:
The probability that is person is not a swimmer is 0.3. The probability that out of 5 persons 4 are swimmers is
Given:
n=5
q=0.3
P(x=4)=?
P=1-0.3=0.7
P(x=r)= nCr pr qn-r
P(x=4)= 5C4 p4 q
=5C4 (0.7)4 (0.3)