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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

`84xx5^(6)//6^(10)`

D

None of these

Text Solution

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The correct Answer is:
C
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