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Theoretical Probability

Sum of CET ...

Question

Sum of CET
$80 %$ of the families own a TV set, what is the probability that out of $10$ families $7$ families will own a TV set

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Solution

Probability of having tv is 0.8
Probability that 7 out of 10 family is having tv = ${10_{C}}_{7} {(0.8)}^{7} {(0.2)}^{3}$

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