Question

Question #afe0f

Answer 1

`2.4` lbs

Explanation:

Initial weight of mixture = `12` lbs
Since `10%` of this is banana chips; weight of banana chips in mixture = `(10*12)/100 = 1.2` lbs

Let the weight of additional banana chips added be `color(red)x` lbs.

Now the total weight of mixture becomes `12+x` lbs, and
the total weight of banana chips becomes `1.2+x` lbs.

But now the banana chips account for `25%` of the mixture.

`therefore` `(1.2+x)/(12+x)*100 = 25`

`=> (1.2+x)*100 = (12+x)*25`
`=> 120+100x = 300+25x`
`=> 75x = 180`
`implies x=180/75 = color(red)2.4`

Hence they should add `2.4` lbs of banana chips to bring mixture up to `25%`.