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प्रश्न
In Adarsh High School, out of 30 students in a class 3 students wear glasses (spectacles). If a student in the class is randomly selected, find the probability that he or she wears glasses (spectacles) by completing the following activity
Activity: There are a total of 30 students in the class.
∴ n(S) = `square`
Event: A selected student wears glasses (spectacles).
∴ n(A) = `square`
P(A) = `square/("n"("S"))` ......[Formula]
P(A) = `square`
उत्तर
There are a total of 30 students in the class.
∴ n(S) = 30
Event A: selected student wears glasses (spectacles).
∴ n(A) = 3
P(A) = `("n"("A"))/("n"("S"))` ......[Formula]
P(A) = `3/30` = `1/10`
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