Question

Ted is making trail mix for a party .He mixes 1/1/2cups of nuts,1/4 cup of raisins,and 1/4 cup of pretzels.How many cups of pretzels does Ted need to make 15 cups of trail mix?

Answer 1

1.875 or
`1(7)/(8)` cups of pretzel

Explanation:

The number of cups needed is equivalent to the probability of pretzel in the mix times the number of cups in the mix.

-The probability of pretzel is :

`P(pretzel)=(0.2)/(0.25+0.25+1.5)\\\\=0.125`

We multiply this probability by the number of cups of the mix:

`=P(pretzel)* (mix \ cups)\\\\=0.125* 15\\\\=1.875 \ or \ 1(7)/(8)`

Hence, 1.875 or 1/7/8 cups of pretzel is needed.