antoxavier wrote:
Keri, Neil and Rich use toilet paper in their apartment in a ratio 3:2:2. Rich buys two cases of toilet paper online for everyone's use at 28 rolls per case, an average of $3.50 per roll and a $14 delivery charge. If they each contribute to the cost of the toilet paper in direct proportion to the amount they use, how much must Keri contribute.
Numeric Entry type.
Two cases = 28*2 = 56 rolls.
Cost = 56*$3.5 + $14 = $210.
Keri's share = 3/(3+2+2) = 3/7.
Thus Keri must contribute 3/7*$210 = $90.
Hope
...
