In a class, 30% of the students study Hindi, 45% study Maths and 15% study both Hindi and Maths. If a student is selected at random, what is the probability that the student studies Hindi or Maths?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → \(\frac{3}{5}\)
The students who study both subjects are counted once in Hindi and once in Maths, so they must be subtracted once: P(H or M) = P(H) + P(M) − P(both).
P(H or M) \(=30\%+45\%-15\%=60\%\)
\(\displaystyle 60\%=\frac{60}{100}=\frac{3}{5}\)
