Number of people (in lakhs) in five cities A–E and ratio of three age groups I:II:III. (I: 0–<21; II: 21–<41; III: 41+.)
| City | People (lakh) | I:II:III |
|---|---|---|
| A | 14.4 | 1:3:2 |
| B | 16 | 2:3:3 |
| C | 19.2 | 1:1:2 |
| D | 12.8 | 3:1:4 |
| E | 12 | 1:3:1 |
What is the ratio of the total number of people of age group I in cities A and D together to the number of people of age group I in cities C and E together?
A1 : 2
B1 : 1 ✓ Correct
C2 : 1
D3 : 2
Correct answer: (B) 1 : 1
Explanation
The ratio is 1 to 1, so that is the answer.
Group I in A is 2.4 lakh and in D is 4.8 lakh, totalling 7.2 lakh.
Group I in C is 4.8 lakh and in E is 2.4 lakh, totalling 7.2 lakh.
So the ratio is 7.2 to 7.2.
That simplifies to 1 to 1.
Hence 1 to 1 is correct.
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