Of four numbers whose average is 60 the first is one-fourth…

Are you looking for correct answer of Of four numbers whose average is 60 the first is one-fourth…? Here we have shared detailed answer with explanations.

Of four numbers whose average is 60, the first is one-fourth of the sum of the last three. The first number is –

  1. A. 15
  2. B. 42
  3. C. 45
  4. D. 48

Answer: Option D

Here is complete explanation of Of four numbers whose average is 60 the first is one-fourth….

Solution(By ExamCraze Team)

Let the four numbers be a, b, c and d respectively
Then,
⇒ a = $$frac{1}{4}$$ (b + c + d)
⇒ b + c + d = 4a
Also,
a + b + c + d = 60 × 4 = 240
⇒ a + 4a = 240
⇒ 5a = 240
⇒ a = 48
Hence, first number = 48

Leave a Comment