Question 1155579: In Sadie's Halloween bag, there are 5 Mars bars, 3 Snickers bars, 14 bags of candy, and some other chocolate bars. When she reaches into the bag, if the probability that she chooses a chocolate bar is 0.75, how many other chocolates are in the bag?
Answer by greenestamps(13200)   (Show Source):
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Mars bars and Snickers bars are chocolate, so the "bags of candy" are the only non-chocolate items in her bag.
Since the probability of getting a chocolate is 0.75 = 3/4, the probability of getting a non-chocolate is 1/4.
There are 14 bags of candy, so the total number of items in the bag is 4*14 = 56.
Since there are 5 Mars bars and 3 Snickers bars, the number of other chocolates is 56-(5+3) = 48.
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