Justin, Cody and Cole collected pens in the ratio of 9 : 7 : 9. After Cole gave
15 to Justin and Cody, Cole had 22 less pens than Justin. The number of pens that Cody had increased by 20%. How many pens did Justin and Cole have in the end?
| |
Justin |
Cody |
Cole |
| Before |
9 u |
7 u |
9 u |
| Change |
+ 0.4 u |
+ 1.4 u |
- 1.8 u |
| After |
9.4 u |
8.4 u |
7.2 u |
Number of pens that Cole gave to Justin and Cody
=
15 x 9 u
= 1.8 u
Number of pens that Cody received from Cole
=
20100 x 7 u
= 1.4 u
Number of pens that Justin received from Cole
= 1.8 u - 1.4 u
= 0.4 u
Number of less pens that Cole had less than Justin
= 9.4 u - 7.2 u
= 2.2 u
2.2 u = 22
1 u = 22 ÷ 2.2 = 10
Number of pens that Justin and Cole had
= 9.4 u + 7.2 u
= 16.6 u
= 16.6 x 10
= 166
Answer(s): 166
