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The rule of an "obstacle course" specif...

The rule of an "obstacle course" specifies that at the `n^(th)` obstacle a person has to tos a fair 6 sided die n times. If the sum of points in these n tosses is bigger than `2^(n)`, the person is said to have crossed the obstacle.
Q. The probability that a person crosses the first two obstacles but fails to cross the third obstacle.

A

`(36)/(243)`

B

`(116)/(216)`

C

`(35)/(243)`

D

`(143)/(243)`

Text Solution

Verified by Experts

The correct Answer is:
C
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