Probability Question 132
Question: A die is tossed 5 times. Getting an odd number is considered a success. Then the variance of distribution of success is
[AIEEE 2002]
Options:
A) $ \frac{8}{3} $
B) $ \frac{3}{8} $
C) $ \frac{4}{5} $
D) $ \frac{5}{4} $
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Answer:
Correct Answer: D
Solution:
Probability of getting odd $ p=\frac{3}{6}=\frac{1}{2}. $
Probability of getting others $ q=\frac{3}{6}=\frac{1}{2} $
Variance $ =npq $
$ =5.\frac{1}{2}.\frac{1}{2}=\frac{5}{4}. $
BETA
