The ratio of mangosteens to kiwis is 3 : 7. If 9 kiwis are added, the ratio of mangosteens to kiwis will be 3 : 10. How many less mangosteens than kiwis are there in the end?
| |
Mangosteens |
Kiwis |
| Before |
3 u |
7 u |
| Change |
|
+ 9 |
| After |
3 u |
10 u |
The number of mangosteens at first and in the end remains unchanged.
Number of kiwis added
= 10 u - 7 u
= 3 u
3 u = 9
1 u = 9 ÷ 3 = 3
Number of less mangosteens than kiwis in the end
= 10 u - 3 u
= 7 u
= 7 x 3
= 21
Answer(s): 21
