# Problem #1142

 1142 The average (mean) of 20 numbers is 30, and the average of 30 other numbers is 20. What is the average of all 50 numbers? $(\mathrm {A}) \ 23 \qquad (\mathrm {B}) \ 24 \qquad (\mathrm {C})\ 25 \qquad (\mathrm {D}) \ 26 \qquad (\mathrm {E})\ 27$ This problem is copyrighted by the American Mathematics Competitions.
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