Five percent of all international video calls on Interphone.com are dropped.Suppose you randomly choose 5 recent calls.If you use the binomial function to compute the probability that exactly 3 of the 5 calls are dropped, what is the value of the binomial coefficient in you computation?
A).0458
B)5.0
C)10.0
D).0011
E)2.0

Question

Quizplus · Accepted Answer

The binomial coefficient for choosing exactly 3 calls out of 5 is calculated using the combination formula, which is $C(n, k) = \frac{n!}{k!(n-k)!}$. Here, $n=5$ and $k=3$, so the binomial coefficient is $C(5, 3) = \frac{5!}{3!(5-3)!} = \frac{5 \times 4}{2 \times 1} = 10.0$.

Five Percent of All International Video Calls on Interphone