math
posted by Anonymous .
Four friends contribute sums of money to a charitable organization in the ratio 2:4:5:7. If the largest amount contributed is $1.40, calculate the total amount contributed by the four people

Let their amounts of contribution be
2x , 4x, 5x, and 7x
7x = 1.4
x = .2
so they contributed
$ 0.40 , 0.80, 1. 00, and 1.40
for a total of $3.60
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