Probability Question 373
Question: In tossing 10 coins, the probability of getting exactly 5 heads is
[MP PET 1996]
Options:
A) $ \frac{9}{128} $
B) $ \frac{63}{256} $
C) $ \frac{1}{2} $
D) $ \frac{193}{256} $
Show Answer
Answer:
Correct Answer: B
Solution:
Required probability $ ={}^{10}C_5\times {{( \frac{1}{2} )}^{5}}.{{( \frac{1}{2} )}^{5}}=\frac{63}{256}. $
BETA
