Question
The average of 6 numbers is 45. If one more number is
added, the new average becomes 47. Find the number added.Solution
The average of 6 numbers is 45. If one more number is added, the new average becomes 47. Find the number added. Solution: Sum of 6 numbers = 6 × 45 = 270 Let the new number be x. Sum of 7 numbers = 270 + x New average = 47: (270 + x)/7 = 47 270 + x = 329 x = 329 − 270 = 59 Answer: The number added is 59.
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