SOLUTION: Three defective electric toothbrush were accidentally shipped to a drugstore by clean rush products along with 17 no defective ones. A. What is the probability the first two ele

Algebra ->  Probability-and-statistics -> SOLUTION: Three defective electric toothbrush were accidentally shipped to a drugstore by clean rush products along with 17 no defective ones. A. What is the probability the first two ele      Log On


   

Question 922378: Three defective electric toothbrush were accidentally shipped to a drugstore by clean rush products along with 17 no defective ones.
A. What is the probability the first two electric toothbrush sold will be return to the drugstore because they are defective?
B. What Is the probability the first two electric toothbrush sold will not be defective?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
20 TB: 3Def, 17Good
A. P(1st two def) = %283%2F20%29%282%2F19%29
B> P(1st two Good) = %2817%2F20%29%2816%2F19%29