The probability that Caroline wins a raffle is given by the expression m/n.
Write down an expression, in the form of a combined single fraction, for the probability that Caroline does not win.

This is the same as writing (n-m)/n

Don't forget about the parenthesis if you go with the second option.

==================================================

Explanation:

The probability that she wins is m/n, where m,n are placeholders for positive whole numbers.

For instance, m = 2 and n = 5 leads to m/n = 2/5. This would mean that out of n = 5 chances, she wins m = 2 times.

The probability of her not winning is 1 - (m/n). We subtract the probability of winning from 1 to get the probability of losing.

We could leave the answer like this, but your teacher says that the answer must be "in the form of a combined single fraction".

Doing a bit of algebra would have these steps

and now the expression is one single fraction.

its the fourth option

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315