WBJEE · Maths · Probability
In a group of 14 males and 6 females. 8 and 3 of the males and females, respectively are aged above 40 yr. The probability that a selected at random from the group is person aged above \(40 \mathrm{yr}\) given that the selected person is a female, is
- A \(\frac{2}{7}\)
- B \(\frac{1}{2}\)
- C \(\frac{1}{4}\)
- D \(\frac{5}{6}\)
Answer & Solution
Correct Answer
(B) \(\frac{1}{2}\)
Step-by-step Solution
Detailed explanation
Number of males = 14 and females \(=6\) Total =14+6=20 Males above \(40 \mathrm{yr}=8\) and females above \(40 \mathrm{y}=3\) Now, P (selected person is female and above 40 yn) \(=\frac{3}{6}=\frac{1}{2}\)
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