Two years ago the mean age of 40 people was 11 years. Now
the mean age is changed to 12 vears. Find the age of the person who left the group
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Answer:
left person age 52 years
Step-by-step explanation:
2 years ago average age of 40 people 11 years.
Total age = 40 * 11 = 440 years
now total age = 440 + 40*2
= 520 years.
39 people average age = 12 years
Total age = 39 * 12 = 468 years.
who left = 520 - 468 = 52 years
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