Undergrads: Terrible study habits?

allyphoe
Wed, 12 Dec 2012 17:14:44 +0000

(.55x + .25y)/(x+y)=.49, and both x and y are positive and non-zero
.55x + .25y = .49x + .49y
.06x = .24y
x = 4y

You need 4 bars of the 55% to every one bar of 25%.

To get the initial equation, remember that you’re calculating the average chocolate content, so need to divide by the total number of bars.