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19 January, 23:32

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

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  1. 19 January, 23:51
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    You used, and. as the variables, but i prefer using X and Y because this makes my explanaition easier to follow. You have the first toy with a chance of being broken of X, where X could for example be 20% or 0,2 and you have a second toy which has a chance of being broken of Y, where Y for instance could be 10% or 0,1. The chance that both toys are broken is XY, which in my example would be 20% * 10% = 2%
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