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# Write the Probability of a Sure Event - ICSE Class 10 - Mathematics

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ConceptProbability - A Theoretical Approach

#### Question

Write the probability of a sure event

#### Solution

The probability of a sure event is 1i.e.p(s)=1 where s is the sure event .

Proof: In a sure event n(E) = n(s)

[Since number of elements in Event 'E' will be equal to the number of element in sample-space.]

By definitions of probability:

P(s)=n(E)/n(s)=1

p(s)=1

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Solution Write the Probability of a Sure Event Concept: Probability - A Theoretical Approach.
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