SOLUTION: Assume the probability that an employee selling products is successful in a randomly selected sales call is 0.5. Assume sales calls are independent and the employee is doing 2 sa

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Question 416795: Assume the probability that an employee selling products is successful in a randomly selected sales call is 0.5.
Assume sales calls are independent and the employee is doing 2 sales calls.
What is the probability that at least one of the two sales calls is successful?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

Note: The probability of x successes in n trials is: 

P = nCx* p%5Ex%2Aq%5E%28n-x%29 where p and q are the probabilities of success and failure respectively. 

In this case p = .5 and q = .5 

nCx = n%21%2F%28x%21%28n-x%29%21%29

Assume sales calls are independent and the employee is doing 2 sales calls

P(at least one of the two sales calls is successful) = 1-P(none)= 1 - (.5)^2

P(at least one of the two sales calls is successful) = .75