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In a packet of stickers there are 3 small stars, 8 big stars, 13 small rockets, and 7 big rockets. Henry is going to choose one of these stickers from the packet at random to put on his artwork. What is the probability that the sticker Henry chooses is big or is a star?Do not round intermediate computations, and round your answer to the nearest hundredth.

Question

In a packet of stickers there are 3 small stars, 8 big stars, 13 small rockets, and 7 big rockets. Henry is going to choose one of these stickers from the packet at random to put on his artwork. What is the probability that the sticker Henry chooses is big or is a star?Do not round intermediate computations, and round your answer to the nearest hundredth.

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Solution

To solve this problem, we first need to determine the total number of stickers and the number of stickers that are either big or a star.

  1. Calculate the total number of stickers: There are 3 small stars, 8 big stars, 13 small rockets, and 7 big rockets. So, the total number of stickers is 3 + 8 + 13 + 7 = 31 stickers.

  2. Calculate the number of stickers that are either big or a star: The big stickers are 8 big stars and 7 big rockets, so there are 8 + 7 = 15 big stickers. The star stickers are 3 small stars and 8 big stars, so there are 3 + 8 = 11 star stickers. However, the big stars have been counted twice (once as big stickers and once as star stickers), so we need to subtract the 8 big stars from our total. So, the number of stickers that are either big or a star is 15 + 11 - 8 = 18 stickers.

  3. Calculate the probability: The probability that the sticker Henry chooses is big or is a star is the number of big or star stickers divided by the total number of stickers. So, the probability is 18 / 31 = 0.58 (rounded to the nearest hundredth).

This problem has been solved

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