Statistics And Probability Question 195
Question: From a class of 12 girls and 18 boys, two students are chosen randomly. What is the probability that both of them are girls
Options:
A) $ \frac{22}{145} $
B) $ \frac{13}{15} $
C) $ \frac{1}{18} $
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
-
Required probability = $ \frac{{}^{12}C_2}{{}^{30}C_2}=\frac{12\times 11}{30\times 29}=\frac{22}{145}. $
BETA
