two years ago the mean of 40 people was 11 years now a person left the group and the mean has changed to 12 years .find the age of the pearsilon who left the group.
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Step-by-step explanation:
Two years ago the mean age of 40 people was 11 years . ⇒ So, at present the mean age will be increased by 2,. Hence, the mean age at present will be 11 + 2 = 13 years,.
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Hi,
The answer is 52 years. You can find the solution in the attachment.
Hope it helps.
The answer is 52 years. You can find the solution in the attachment.
Hope it helps.
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