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A fair coin is tossed 8 times. Find the ...

A fair coin is tossed 8 times. Find the probability that it shows heads
(i) exactly 5 times (March ' 17)
(2) at lest once . (March ' 14- 17 )

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Verified by Experts

The correct Answer is:
`(7)/(32),(255)/(256)`
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NAVNEET PUBLICATION - MAHARASHTRA BOARD-QUESTION BANK 2021-BINOMIAL DISTRIBUTION
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  13. If X ~ B (n,p) with n=10 , p = 0.4 the E (X^(2 ))=?

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