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If m rupees coins and n ten paise coins ...

If m rupees coins and n ten paise coins are placed in a line, then the probability that the extreme coins are ten paise coins is (Assume coins of same type are identical)

A

`.(m+n)C_(m)`

B

`(n(n+1))/((m+n)(m+n-1))`

C

`.^(m+n)P_(m)`

D

`.^(m+n)P_(n)`

Text Solution

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The correct Answer is:
B
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OBJECTIVE RD SHARMA ENGLISH-PROBABILITY -Section I - Mcqs
  1. Let A and B be two independent events. The probability of their sim...

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  2. E and F are two independent events. The probability that both e and F ...

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  3. If m rupees coins and n ten paise coins are placed in a line, then the...

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  4. If A and B are two events such that P(A) = 3/4 and P(B) = 5/8, then

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  5. If there are 6 girls and 5 boys who sit in a row, then the probability...

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  6. One mapping is selected at random from all the mappings of the set ...

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  7. Let A and B be two finite sets having m and n elements respectively su...

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  8. Two dices are roled one after the other. The probability that the numb...

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  9. A natural number is chosen at random from the first 100 natural number...

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  10. A binary operation is chosen at random from the set of all binary oper...

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  11. A four figure number is formed of the figures 1, 2, 3, 4, 5 with no ...

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  12. Suppose n ( >=3) persons are sitting in a row. Two of them are selecte...

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  13. India play two matches each with West Indies and Australia. In any ...

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  14. In shuffling a pack of 52 playing cards, four are accidently droppe...

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  15. If A and B are independent events such that P(A) gt0, P(B) gt 0, then

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  16. If A and B are independent events such that P(A) gt 0, P(B) gt 0, then

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  17. Twelve balls are distributed among three boxes, find the probability ...

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  18. A committee of five is to be chosen from a group of 9 people. The prob...

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  19. The probability of two events A and B are 0.25 and 0.50 respectivel...

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  20. about to only mathematics

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