3 years ago

Don’t understand need help and pls show work DUE TOMORROW

1 answer:

NARA [144]3 years ago

4 0

$18/100 \times 42/100 = 0.18 \times 0.42$

0.0756

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Keith_Richards [23]

Answer:

P(X = 12) = 0.0064.

Step-by-step explanation:

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

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$P(X = 12) = C_{30,12}.(0.2)^{12}.(0.8)^{18} = 0.0064$

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