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31. Probability
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Q7 of 63 Page 963

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

We know that,


Probability of occurrence of an event


Total no.of outcomes = 10+25 = 35


Desired outcomes are prizes. Total no.of desired outcomes = 10


Therefore, the probability of getting a prize



Conclusion: Probability of getting a prize is


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6 D

An urn contains 9 red, 7 white, and 4 black balls. A ball is drawn at random. Find the probability that the ball is drawn is

white or black


6 E

An urn contains 9 red, 7 white, and 4 black balls. A ball is drawn at random. Find the probability that the ball is drawn is

not white


8

If there are two children in a family, find the probability that there is at least one boy in the family

9 A

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Questions · 63
31. Probability
1 2 2 2 C 2 2 E 2 F 3 4 4 4 C 4 D 4 5 6 A 6 B 6 C 6 D 6 E 7 8 9 A 9 B 9 C 9 D 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
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