Mathematics, 07.03.2020 00:29 nothingworksoutforme

Donald has ordered a computer and a desk from 2 different stores. Both items are to be delivered Tuesday. The probability that the computer will be delivered before noon is .6 and the probability that the desk will be delivered before noon is .8. If the probability that either the computer or the desk will be delivered before noon is .9, what is the probability that both will be delivered before noon?

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Donald has ordered a computer and a desk from 2 different stores. Both items are to be delivered Tue...