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If the average, of a given number, 50% of that number and 25% of the same number is 280, then the number is
  • a)
    280
  • b)
    480
  • c)
    360
  • d)
    None of the above
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
If the average, of a given number, 50% of that number and 25% of the s...
Given:
Average is 280.
Formula used:
Average = sum of the observation/number of the observation     
Calculation:
Let the number be x
According to the question,
⇒ (x + 50% of x + 25% of x)/3 = 280
⇒ (x + x/2 + x/4)/3 = 280
⇒ 7x/12 = 280
⇒ x =  480
∴ The number is 480.
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