Question

A sales rep for a national clothing company makes 4 calls per day. Based on historical​ records, the following probability distribution describes the number of successful calls each day. Successful Calls 0 1 2 3 4 Probability 0.10 0.30 0.30 0.20 0.10 Based on the information​ provided, what is the probability of having at least 2 successful calls in one​ day?(A) 0.30(B) 0.60(C) 0.09(D) 0.15(E) 0.06

Answer 1

Answer:

The correct answer is

(B) 0.60

Step-by-step explanation:

This probability distribution means that we have these following probabilities:

$P(X = 0) = 0.10$

$P(X = 1) = 0.30$

$P(X = 2) = 0.30$

$P(X = 3) = 0.20$

$P(X = 4) = 0.10$

What is the probability of having at least 2 successful calls in one​ day?

This is the following probability.

$P = P(X = 2) + P(X = 3) + P(X = 4)$

$P = 0.30 + 0.20 + 0.10$

$P = 0.60$

The correct answer is

(B) 0.60