Question
The average number of wafers in Box Z, Box A and Box B is 37. Box Z has 31 wafers. The number of wafers in Box A is thrice the number of wafers in Box B. What is the number of wafers in Box B?
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The average number of wafers in Box Z, Box A and Box B is 37. Box Z has 31 wafers. The number of wafers in Box A is thrice the number of wafers in Box B. What is the number of wafers in Box B?