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In a lottery, there are 10 prizes and 25...

In a lottery, there are 10 prizes and 25 blanks. Find the probability of getting a prize.

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The correct Answer is:
`2/7`
There are 10 prizes and the total number of outcomes is 35.
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RS AGGARWAL-PROBABILITY-Exercise 31 A
  1. A bag contains 4 white and 5 black balls. A ball is drawn at random fr...

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  2. An urn contains 9 red, 7 white and 4 black balls. A ball is drawn at r...

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  3. In a lottery, there are 10 prizes and 25 blanks. Find the probability ...

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  4. If there are 2 children in a family, find the probability that there i...

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  5. Three unbiased coins are tossed once. Find the probability of getting ...

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  6. In a single throw of two dice, detemine the probability of not getting...

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  7. If a letter is chosen at random from the English alphabet, find the pr...

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  8. A card is drawn at random from a well - shuffled pack of 52 cards. Wha...

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  9. Tickets numbered from 1 to 12 are mixed up together and then a ticket ...

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  10. What is the probability that on ordinary year has 53 Tuesdays ?

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  11. What is the probability that a leap year has 53 Sundays ?

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  12. What is the probability that in a group of two people, both will have ...

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  13. Which of the following cannot be the probability of occurrence of an e...

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  14. If 7/10 is the probability of occurrence of an event, what is the prob...

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  15. The odds in favour of the occurrence of an event are 8 : 13. Find the ...

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  16. If the odds against the occurrence of an event be 4 : 7, find the prob...

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  17. If 5/14 is the probability of occurrence of an event, find (i) the o...

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  18. Two dice are thrown. Find (i) the odds in favour of getting the sum ...

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  19. A combination lock on a suitcase has 3 wheels, each labelled with nine...

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  20. In a lottery, a person choses six different natural numbers at rand...

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