1.

A biased coin is tossed 10 times. The head is 2 times more likely to appear than the tail. The probability that 2^("nd") tail and 4^("th") tail occur at 4^("th") and 10^("th") tosses respectively is

Answer»

`(16)/(3^(9))`
`(320)/(3^(10))`
`(320)/(3^(9))`
`(160)/(3^(10))`

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