Mathematics, 30.05.2020 22:05 Delgadojacky0206

There are 20 peoples in a singing group. The mean age of 12 of the members is 18years. The mean age of the remaining 8 is 23 years. What is the mean age of the 20 members of the singing group?

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There are 20 peoples in a singing group. The mean age of 12 of the members is 18years. The mean age...