Probability question?

Three defective electric toothbrushes were accidentally shipped to a drugstore by Cleanbrush Products along with 13 non-defective ones. a. What is the probability the first two toothbrushes sold will be defective? (Round the final answer to 5 decimal places.) b. What is the probability the first two electric... show more Three defective electric toothbrushes were accidentally shipped to a drugstore by Cleanbrush Products along with 13 non-defective ones.

a.
What is the probability the first two toothbrushes sold will be defective? (Round the final answer to 5 decimal places.)


b.
What is the probability the first two electric toothbrushes sold will not be defective? (Round the final answer to 4 decimal places.)
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