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in Probability by (70.4k points)
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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. `(25)/(216)`
B. `(25)/(36)`
C. `(5)/(36)`
D. `(125)/(216)`

1 Answer

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Best answer
Correct Answer - A
P(X=3)= Probability of getting 6 in third trial
`=(5)/(6)xx(5)/(6)xx(1)/(6)=(25)/(216)`

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