AP EAMCET · Maths · Probability
In a class consisting of 40 boys and 30 girls. \(30 \%\) of the boys and \(40 \%\) of the girls are good at Mathematics. If a student selected at random from that class is found to be a girl, then the probability that she is not good at Mathematics is
- A \(\frac{3}{5}\)
- B \(\frac{2}{5}\)
- C \(\frac{3}{10}\)
- D \(\frac{7}{10}\)
Answer & Solution
Correct Answer
(A) \(\frac{3}{5}\)
Step-by-step Solution
Detailed explanation
\(40 \%\) of girls are good in maths \(\Rightarrow \frac{40}{100} \times 30=12\) girls are good in maths 18 girls are not good at mathematics Required probability \(=\frac{18}{30}=\frac{3}{5}\)
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