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)= ^{n}C_{r} p^{r} q^{n-r}

P(x=4)= ^{5}C_{4} p^{4} q

=^{5}C_{4} (0.7)^{4} (0.3)

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