A fair die is thrown 20 times. The proba...

A fair die is thrown 20 times. The probability that on the 10th throw, the fourth six appears is

A

`(""20 C_(10) xx 5^(6))/(6^(20))`

B

`(120 xx 5^(7))/(6^(10))`

C

`(84 xx 5^(6))/(6^(10))`

D

None of these

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The correct Answer is:

C

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