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1. In a room, all except 18 of the people are over 50 years of age. 15 of the people in the room are under 50 years of age. If 10% of the people are at the age of 50 years, how many people are in the room>
- A. 27
- B. 27
- C. 27
- D. 27
Answer: Option B
Explanation:
let,
Total number of people = x
50 years of age = x - 18
Under 15 years of age = 15
0.10x = x - x + 18 - 15
∴x = 30
ans: 30
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