the arithmetic mean of 40 numbers is 65 if each of the numbers is increased by 7 what will be mean of the new numbers
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Step-by-step explanation:
AM = (Sum of 40 numbers)/40 = 65
Sum of 40 numbers = 65 * 40 = 2600
When each of the values increase by 5, total increase = 40 * 5 = 200
Therefore, New sum = 2600+200 = 2800
New mean = 2800/40 = 70
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