A telephone exchange receives on an average 5 calls per minu... | Mathematics | SolveeIt | Solveeit

Today, August 18

Question

A telephone exchange receives on an average 5 calls per minute. The probability of receiving 3 or less calls per minute is :

A

$15e^{-5}$

B

$\frac{118}{3}e^{-5}$

C

$\frac{15}{4}e^{-5}$

D

$\frac{13}{3}e^{-4}$

Answer

$\frac{118}{3}e^{-5}$

Explanation

Solution

The correct option is (B):

$\frac{118}{3}e^{-5}$