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If the letters of the word PROBABILITY a...

If the letters of the word PROBABILITY are written down at random in a row, the probability that two B-s are retogether is

A

`2//11`

B

`10//11`

C

`3//11`

D

`6//11`

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The correct Answer is:
A
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MTG-WBJEE-STATISTICS AND PROBABILITY-WB JEE Previous Years Questions ( CATEGORY 1 : Single Option Correct Type ( 1 Mark) )
  1. Each of a and b can take values of 1 or 2 with equal probability . The...

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  2. Cards are drawn one-by-one without replacement from a well shuffled pa...

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  3. There are two coins, one unbiased with probability 1/2 or getting head...

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  4. A fair six-faced die is rolled 12 times. The probability that each fac...

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  5. Ram is visiting a friend. Ram knows that his friend has 2 children and...

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  6. In a certain town, 60% of the families own a car, 30% own a house and ...

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  7. The variance for first 20 natural numbers is

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  8. A fair coin is tossed at a fixed number of times.If the probability of...

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  9. If the letters of the word PROBABILITY are written down at random in a...

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  10. Let A and B be two events such that P(A nn B) = 1/6, P(A uu B)=31/45...

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  11. S.D. of n observation a(1),a(2),a(3)........a(n) is sigma then the S.D...

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  12. Mean of n observations x(1), x(2), ....,x(n) is bar(x). If an observa...

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  13. The probability that a non-leap your selected at random will contain 5...

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  14. In order to get a head at least once with probability >=0.9,the minimu...

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  15. A student appears for tests I, II and III. The student is successful i...

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  16. A problem in mathematics is given to 4 students whose chances of solvi...

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  17. If X is a random variable such that sigma(X)=2.6, then sigma(1-4X) is ...

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