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The average age of some males and 15 females is 18 years. The sum of the ages of 15 females is 240 years and average age of males is 20 years. Find the number of males. 
  • a)
    8
  • b)
    7
  • c)
    10
  • d)
    15
  • e)
    None of these
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The average age of some males and 15 females is 18 years. The sum of t...
Let there are n no. of males 
∴ (n + 15) × 18 = 240 + 20n
⇒ n = 15
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Most Upvoted Answer
The average age of some males and 15 females is 18 years. The sum of t...
Given:

- Average age of some males and 15 females is 18 years
- Sum of the ages of 15 females is 240 years
- Average age of males is 20 years

To find: Number of males

Solution:

Let the number of males be x.

Total number of people = x + 15

Total age of people = (x * 20) + 240

Using the given information, we can form the following equation:

Total age of people / Total number of people = 18

((x * 20) + 240) / (x + 15) = 18

Solving for x, we get:

x = 15

Therefore, the number of males is 15.

Answer: Option D (15)
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Community Answer
The average age of some males and 15 females is 18 years. The sum of t...
15
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