Mathematics, 22.07.2021 17:30 jameslinimk

While out for a run, two joggers with an average age of 55 are joined by a group of three more joggers with an average age of m. if the average age of the group of five joggers is 45, which of the following must be true about the average age of the group of 3 joggers? a) m=31
b) m>43
c) m<31
d) 31 < m < 43

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