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Question

# The probability of a certain event is (a) 0 (b) 1 (c) greater than 1 (d) less than 0

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Solution

## We have to find the probability of a certain event. Note that the number of occurrence of an impossible event is same as the total number of trials. When we repeat the experiment, every times it occurs. This is the reason that’s why it is called certain event. Remember the empirical or experimental or observed frequency approach to probability. If n be the total number of trials of an experiment and A is an event associated to it such that A happens in m-trials. Then the empirical probability of happening of event A is denoted byand is given by Note that n is a positive integer, it can’t be zero. So, the probability of an impossible event is. Hence the correct option is (b).

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