A shipment of 40 fancy calculators contains 3 defective units. What is the probability if a college bookstore buys 20 calculators out of this shipment and 1 is defective.

38.46%

Step-by-step explanation:

There are no names or marking that can make the calculator look different, so the order is not important. Then we should use a combination to solve this problem.

There are 40 calculators in one shipment, 37 of them good items and 3 of them are defect items. We need to choose 19 good calculators and 1 defect calculator. The number of ways to do that will be:

* = 37!= 53017895700

The number of possible ways to choose 20 calculators out of 40 calculators will be:

= =137846528820

The chance will be: 53017895700/ 137846528820 = 0.3846= 38.46%

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632

chicken nugget stir fry

step-by-step explanation: