Probability Ques 38
Question-
Directions : The following line graph shows the details of male and female students in five different groups. Consider the following graph and answer the questions given below:
Two students are selected from Group - $Q$ at random one by one with replacement. What is the probability that both the students are females?
(1) $\frac{9}{25}$
(2) $\frac{16}{49}$
(3) $\frac{11}{30}$
(4) $\frac{25}{42}$
(5) $\frac{14}{34}$
Show Answer
Correct Answer: (1)
Solution: (1)
Required probability $=\frac{{ }^{6} C_{1}}{{ }^{10} C_{1}} \times \frac{{ }^{6} C_{1}}{{ }^{10} C_{1}}=\frac{6}{10} \times \frac{6}{10}$ $=\left(\frac{3}{5}\right)^{2}=\frac{9}{25}$
BETA
