Mrs. Jones buys two toys for her son. The probability that the first toy is defective is 13, and the probability that the second toy is defective given that the first toy is defective is 15. What is the probability that both toys are defective?

115

14

18

35
Done

Question

Mrs. Jones buys two toys for her son. The probability that the first toy is defective is 13, and the probability that the second toy is defective given that the first toy is defective is 15. What is the probability that both toys are defective?

115

14

18

35
Done

mathmale · Answer

Back to the drawing board!  Probabilities are ALWAYS between zero and one:$$0\le p \le1$$

mathmale · Answer

so the first number you mention, 13, could not possibly be a probability.  Please ensure you've copied the problem correctly.

mathmale · Answer

This problem is an example of a particular category of probability.  What's its name?