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A contest consist of predicting the resu...

A contest consist of predicting the result win, draw or defeat of 7 football matches. A sent his entry predicting at random. The probability that his entry will contain exactly 4 correct predictions is

A

`(8)/(3^7)`

B

`(16)/(3^7)`

C

`(280)/(3^7)`

D

`(560)/(3^7)`

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The correct Answer is:
B
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