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The expected value of the number of head...

The expected value of the number of heads obtained when three coins are tossed simultaneously is .....

A

1

B

`1.5`

C

0

D

`-1`

Text Solution

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The correct Answer is:
B
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NIKITA PUBLICATION-PROBABILITY DISTRIBUTION-MCQs
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  2. The p.m.f. of a r.v. X is P(x)={{:((c)/(x^(3))","x=1","2","3),(0", oth...

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  3. The expected value of the number of heads obtained when three coins ar...

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  4. A fair coin is tosed 3 times. A person receives "Rs. "X^(2) if he gets...

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  5. If X denotes the number obtained on the uppermost face when a fair di...

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  6. The expected value of the sum of the two numbers obtained when two fai...

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  7. A bakerman sells 5 types of cakes. Profit due to the sale of each type...

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  8. Two cards are drawn at random from a box which contains 5 cards number...

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  9. A r.v. X assumes values 1, 2, 3, …, n with equal probabilities. If Var...

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  10. A r.v. X assumes values 1, 2, 3, …, n with equal probabilities. If Var...

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  11. The p.m.f. of a r.v. X is P(x) = {((2x)/(n(n+1)), x=1","2","....","n),...

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  12. The p.m.f. of a r.v. X is P(x)={{:((2x)/(n(n+1))","x=1","2","...","n),...

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  13. The p.m.f. of a r.v. X is P(x)={{:(kx","x=1","2","3),(0", therwise"):}...

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  14. The p.m.f. of a r.v. X is P(x)={{:(kx","x=1","2","3),(0", otherwise"):...

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  15. The p.m.f. of a r.v X is P(x)={{:(kx","x=1","2","3),(0", otherwise"):}...

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  16. If X denotes the number obtained on the uppermost face when a fair di...

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  17. If X denotes the number obtained on the uppermost face when a fair die...

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  18. The p.m.f. of a r.v. X is P(x)={{:(kx^(2)","x=1","2","3","4),(0", othe...

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  19. The p.m.f. of a r.v. X is P(x){{:(kx^(2)","x=1","2","3","4),(0", other...

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  20. The p.m.f. of a r.v. X is P(x)={{:(2kx","x=1","2","3),(0", otherwise")...

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