7. There are 20 people in a singing group. The mean age of 12 of the membe
The mean age of the...
Mathematics, 31.05.2020 17:58 b2cutie456
7. There are 20 people in a singing group. The mean age of 12 of the membe
The mean age of the remaining 8 is 23 years. What is the mean age of the 2
the singing group?
Answers: 3
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