Question

Celine asks her brother to get some Chinese stir-fry on rice for her. When her brother gets to the store, he realizes that she forgot to tell him what kind of ingredients she wants. Her cell phone is switched off. He can choose two out of four vegetables (carrots, zucchini, mushrooms, onions), and one kind of protein (beef, chicken, fish, or tofu). He randomly chooses a protein (from beef, chicken, fish, or tofu), and then randomly chooses a pair of vegetables (from carrots, zucchini, mushrooms, onions). All answers to the questions below that are not integers must be given with threedigits after the decimal point.

a) The probability that carrots and beef will be in the stir-fry is _____
b) The probability that carrots or beef will be in the salad is _____
c) Given that beef is in the salad, the probability that carrots are also in the salad is ______

Answer 1

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