1.

India and Pakistan play a series of 'n' one day matches and probability than India wins a match against Pakistan is (1)/(2) IF n = 7 , then probabilitythat India wins atleast three consecutive matches is

Answer»

`(17)/(2^(6))`
`(47)/(2^(7))`
`(47)/(2^(6))`
None

Solution :(i)REQUIRED probability `= (1)/(2)`.
(ii) Required probability `= ((1)/(2))^(3)+((1)/(2))^(4)+((1)/(2))^(4)+((1)/(2))^(4)+((1)/(2))^(4)-((1)/(2))^(7)=(47)/(2^(7))`.


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