Average of three numbers is 60. First number is one fourth of the sum of the all numbers. The first number is:
Answer & explanation
Correct answer: option 4
Let the three numbers are = x, y, z
ATQ,
⇒ \(x\) = \(\frac{1}{4}\) (x+y+z)
⇒ x + y + z = 4x --------- (i)
Average of three no. = 60
⇒ \(\frac{x+y+z}{3}\) = 60
From eqn (i)
⇒ \(\frac{4x}{3}\) = 60
⇒ x = 45