SOLUTION: The average age of a group of 50 people is 45 years. Three members, ages 50, 60, and 72, leave the group. What is the average of the remaining 47 people?
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Question 1069594: The average age of a group of 50 people is 45 years. Three members, ages 50, 60, and 72, leave the group. What is the average of the remaining 47 people? Answer by ikleyn(52914) (Show Source):
You are given = = 45,
Hence, the sum of ages of 50 people is S = 45*50 = 2250.
When 3 members left the group, the sum S became 2250 - (50+60+72) = 2068.
Their average age is = 44 years.
Answer. 44 years.
