Multiple choice

If the difference between the average age of x, y and y, z is 12, then difference between x and z is:

  1. 12

  2. 48

  3. 6

  4. 24
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D Correct answer
Explanation

The difference between average ages of (x, y) and (y, z) is 12. Setting up the equation: (x+y)/2 - (y+z)/2 = 12, which simplifies to (x-z)/2 = 12, giving x - z = 24. This means the difference between x and z is 24.

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