Step-by-step explanation:
A fraction between 0 and 1/2
What is smaller than 1/2?
Smaller than 0.5 is 0.3
0.3 = 1/3
A fraction smaller than 1/2 and bigger than 0 is 1/3
Final answer: 1/3
You can get 3 refills.
First you subtract $4.50-$1.65 which equals $2.85. Then you find out how many times 95¢ can go into that. It goes in 3 times so you can get 3 refills.
Combinations of 7 taken 4 at a time.
C (7,4) = 7! /[ 4!(3!)]
7 x 6 x 5 = 210
210 divided by 3 = 70
70 divided by 2 = 35
