The ratio of Fabian's age to Glen's age is 7 : 4. Next year, their average age will be 23. How old will Fabian be in 3 years' time?
| |
Fabian |
Glen |
Total |
| Before |
7 u |
4 u |
44 |
| Change |
+ 1 |
+ 1 |
|
| After |
7 u + 1 |
4 u + 1 |
46 |
Total age of Fabian and Glen this year
= 7 u + 4 u
= 11 u
Total age of Fabian and Glen this year
= 2 x 23 - 1 - 1
= 46 - 2
= 44
11 u = 44
1 u = 44 ÷ 11 = 4
Fabian's age in 3 years' time
= 7 u + 3
= 7 x 4 + 3
= 28 + 3
= 31
Answer(s): 31
