A fair die is tossed repeatedly until a 6 is obtained. Let X denote the number of tosses rerquired.
The probability that `X=3` equals
A. `25//216`
B. `25//36`
C. `5//36`
D. `125//216`

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1 Answers

Correct Answer - A
`P(X=3)=((5)/(6))((5)/(6))1/6=25/216`

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