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What is the probability of a sure event?

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+2 votes
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in Mathematics - Class 11 by (789k points)
What is the probability of a sure event?

(a) 0

(b) 1

(c) 1/2

(d) 1/4

The question was asked in final exam.

This interesting question is from Probability in chapter Probability of Mathematics – Class 11

1 Answer

+1 vote
by (311k points)
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Best answer
Right option is (b) 1

Explanation: Sure event has all outcomes in favour i.e. number of outcomes in favour equal to the total number of possible outcomes.

And probability is ratio of number of outcomes in favour to the total number of possible outcomes.

So, probability of sure event will be 1.

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