3+5+7 = 15 total marbles
3 are red
so she has a 3/15 reduces to 1/5 probability of picking a red one
Answer:
Step 2
Step-by-step explanation:
Michelle's step in trying to solve the equation is given below:

Michelle made a mistake in Step 2.
The right hand side of Step 1: 
Rather, the correct sum is:

0.4 / 2 = 0.2
1/0.2 = 5
2/5 is the answer
Answer:
120
Step-by-step explanation:
10*24=240
240/2=120