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A group of 12 persons, of which 3 are extremely patient, other 6 are extremely honest and rest are extremely kind. A person from the group is selected at random. Assuming that each person is equally likely to be selected, find the probability of selecting a person who is (i) extremely patient,(ii) extremely kind or honest. Which of the above values you prefer more?

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The correct Answer is:
`(i) 1/4 (ii) 3/4`

Total number of persons in the group = 12.
(i) Number of persons who are extremely patient = 3.
P(selecting a person who is extremely patient) =` 3/12 = 1/4`.
(ii) Number of persons who are extremely honest = 6.
Number of persons who are extremely kind = 12 - (3+6) = 3.
`: .` P(selecting a person who is extremely kind or extremely honest) ` = (3+6)/12 = 9/12 = 3/4`.
From the given three values, we perfer honesty. Honesty can get rid of rampant corruption which is a burning issue of the present society.
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RS AGGARWAL-PROBABILITY-Exercise 19B
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  3. A bag contains 18 balls out of which x balls are red. (i) If one bal...

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  4. A jar contains 24 marbles. Some of these are green and others are blu...

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  5. A jar contains 54 marbles each of which is blue, green or white. The ...

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  6. A carton consists of 100 shirts of which 88 are good and 8 have minor ...

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  7. A group of 12 persons, of which 3 are extremely patient, other 6 are e...

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  8. A die is relled twice. Find the probability that 5 will come up both t...

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  9. Two dice are rolled once. Find the probability of getting such number...

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  10. A letter is chosen at random from the letters of the word 'ASSOCIATIO...

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  11. Five cards- the tan, jack, queen, king and ace of diamonds are well sh...

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  12. A card is drawn at random from a well shuffled pack of 52 cards. Find ...

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  13. What is the probability that on ordinary year has 53 Mondays?

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  14. All red face cards are removed from a pack of playing cards. The re...

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  15. All kings, queens are aces are removed from a pack of 52 cards. The ...

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  16. A game consists of tossing a one-rupee coin three times, and noting it...

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  17. Find the probability that a leap year selected at random will contain ...

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  18. The probability of selecting a rotten apple randomly from a heap of 90...

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  19. A bag contains 15 white and some black balls. If the probability o...

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  20. Find the probability of getting the sum of two numbers, less than 3 or...

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