1.

A biased coin with probability p(0ltplt1) of getting heads, is tossed until a head appears for the first time. If the probability that the number of tosses required is even is 1//5, then p is equal to…….

Answer»

`(2)/(3)`
`(1)/(6)`
`(1)/(3)`
`(1)/(4)`

Solution :`f(x)=(n-(sqrt(29)+1)/(2))(n-(sqrt(29)-1)/(2))`
BREAK into PARTIAL fractions.


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