math
posted by Julia Ten .
in a club the average age of male members is 35 and the average age of the female members is 25. if 20 percent of the members are male , what is the average age of all the club members?

20% of the members are male, so (120%)=80% of the members are female.
20% = 0.2 and 80% = 0.8
The average age can be found by multiplying the proportions of the group by the average age of the group:
0.20*35 + 0.80*25 = ?
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