Question
In a class , 30% of the students offered English , 20% offered Hindi and 10% offered both . If a student is selected at
random, what is the probability that he has offered English or Hindi ?
Answer: Option A
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P(E) = `30/100 = 3/10`,
P (H) = `20/100 = 1/5`
and `P(E nn H) = 10/100 = 1/10`
P (E or H) = `P (E uu H)`
=` P(E) + P(H) - P(E nn H)`
= `(3/10 + 1/5 - 1/10) = 4/10 = 2/5`
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