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A fair die is tossed repeatedly until a ...

A fair die is tossed repeatedly until a six is obtained Let X denote the number of tosses required The probability that `X = 3` equals

A

`(125)/(216)`

B

`(25)/(36)`

C

`(5)/(36)`

D

`(25)/(216)`

Text Solution

Verified by Experts

The correct Answer is:
B
`P(Xge3)=(5)/(6)*(5)/(6)*1=(25)/(36)`
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