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A class consists of 80 students, 25 of t...

A class consists of `80` students, `25` of them are girls and `55` are boys. If `10` of them are rich and the remaining are poor and also `20` of them are intelligent, then the probability of selecting an intelligent rich girls is `5//128` b. `25//128` c. `5//512` d. none of these

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A class consists of 80 students, 25 of them are girls and 55 are boys. If 10 of them are rich and the remaining are poor and also 20 of them are intelligent, then the probability of selecting an intelligent rich girls is a. 5//128 b. 25//128 c. 5//512 d. none of these

A class consists of 80 students, 25 of them are girls and 55 are boys. If 10 of them are rich and the remaining are poor and also 20 of them are intelligent, then the probability of selecting an intelligent rich girls is a) 5//128 b) 25//128 c) 5//512 d) none of these

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Two players toss 4 coins each. The probability that they both obtain the same number of heads is 5//256 b. 1//16 c. 35//128 d. none of these

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There are 45 students in a class and 3/5 of them are boys. How many girls are there in the class?

A cricket club has 15 members, of them of whom only 5 can bowl. If the names of 15 members are put into a box and 11 are drawn at random, then the probability of getting an eleven containing at least 3 bowlers is 7//13 b. 6//13 c. 11//158 d. 12//13

Five horses are in a race. Mr. A selects two of the horses at random and bets on them. The probability that Mr. A selected the winning horse is a) 3//5 b) 1//5 c) 2//5 d) 4//5

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RD SHARMA ENGLISH-PROBABILITY-All Questions
  1. If P(A)=0. 4 ,P(B)=p ,P(AuuB)=0. 6 and if A and B are given to be inde...

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  2. Let A and B be two independent events. The probability of their sim...

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  3. A class consists of 80 students, 25 of them are girls and 55 are boys....

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  4. Two dice are thrown. Find the probability of getting an odd number on ...

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  5. A scientist has to make a decision on each of the two independent even...

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  6. In two successive throws of a pair of dice, determine the probability ...

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  7. A, B and C shot to hit a target. If A hits the target 4 times in 5 ...

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  8. A company has estimated that the probabilities of success fro there pr...

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  9. A can solve 90% of the problems given in a book and B can solve 70%. ...

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  10. A bag contains 5 white, 7 red and 8 black balls. Four balls are drawn ...

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  11. If two switches S1a n dS2 have respectively 90% and 80% chances of wor...

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  12. The machine operates if all of its three components function. The prob...

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  13. An anti aircraft gun take four shots at an enemy plane moving away fro...

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  14. An article manufactured by a company consists of two parts X and Y. In...

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  15. To test the quality of electric bulbs produced in as factory, two bulb...

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  16. A bag contains n white and n red balls. Pairs of balls are drawn witho...

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  17. If Aa n dB are two events such that P(A)=0. 5 ,P(B)=0. 6a n dP(AuuB)=0...

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  18. If P(notA)=0. 7 ,P(B)=0.7 a n dP(B//A)=0. 5 , then find P(A//B)a n dP...

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  19. If P" "(A)" "=" "0. 8 , P(B)" "=" "0. 5 and P(B|A)" "=" "0. 4 , find ...

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  20. A fair dice is rolled. Consider the following events: A={1,2,5},B={2,3...

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