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A box contains 10 white, 6 red and 10 bl...

A box contains 10 white, 6 red and 10 black balls. A ball is drawn at random from the box. What is the probability that the ball drawn is either white or red?

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RD SHARMA ENGLISH-PROBABILITY-All Questions
  1. From a well shuffled deck of 52 cards, 4 cards are drawn at random....

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  2. 100 students appeared for two examinations. 60 passed the first, 50 ...

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  3. A box contains 10 white, 6 red and 10 black balls. A ball is drawn ...

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  4. The probability that a person will travel by plane is 3/5 and that ...

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  5. Two cards are drawn from a well shuffled pack of 52 cards. Find the ...

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  6. Three numbers are chosen at random from numbers 1 to 30. Write the ...

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  7. Persons are sitting in a row. Two of them are selected. Write the pr...

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  8. If a single letter is selected at random from the word 'PROBABILITY', ...

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  9. Find the probability that a leap year will have 53 Fridays or 53 Sat...

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  10. Three dice are thrown simultaneously. What is the probability of ge...

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  11. If the letters of the word MISSISSIPPI are written down at random i...

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  12. What is the probability that the 13th days of a randomly chosen mon...

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  13. Three of the six vertices of a regular hexagon are chosen the rando...

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  14. If E\ a n d\ E2 are independent events, write the value of P(E1uuE2)...

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  15. If A\ a n d\ B are two independent events such that P(barAnnB)=2/15\...

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  16. Three digit numbers are formed using the digits 0,2,4,6,8. A number...

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  17. One card is drawn from a pack of 52 cards. The probability that it i...

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  18. Two dice are thrown together. The probability that a lest one will ...

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  19. Two dice are thrown simultaneously. the probability of obtaining a ...

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  20. Two dice are thrown simultaneously. the probability of obtaining to...

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