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Twenty identical coins each with probabi...

Twenty identical coins each with probability p of showing heads are tossed . The probability of heads showing on 10 coins is same as that of heads showing on 11 coins. Then p=

A

`10//11`

B

`10//21`

C

`11//21`

D

`11//20`

Text Solution

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The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-THEORETICAL DISTRIBUTIONS-EXERCISE 1 (CHOOSE THE CORRECT ANSWER FROM THE ALTERNATIVE 1,2,3 OR 4 GIVEN )
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