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26 January, 09:33

Use the multiplication rule for independent event probabilities. Two friends are both pregnant, and find out they are each expecting twins! Let A be the event that one friend is pregnant with identical twins, and note that P (A) = 0.0045. Let B be the event that the other friend is pregnant with fraternal twins, and note that P (B) = 0.01. A and B are independent events. What is the probability that one friend is pregnant with identical twins, and one friend is pregnant with fraternal twins? Give your answer as a percent, rounded to four decimal places if necessary.

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  1. 26 January, 11:36
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    We have to multiply P (A) and P (B) which is 0.0045 * 0.01 * 100 (to make it a percentage) = 0.0045%.
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