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3 of phone numbers have a sum of 22, if average of 4 numbers is 8, what is the 4th number |
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Answer» average of 4 numbers = 8 sum of 4 numbers = 8 x 4 = 32 4th NUMBER is sum of 4 numbers - sum of 3 numbers = 32 - 22 = 10 4th number = 10 |
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