Question:

The average (arithmetic mean) of x and y is 40. If z = 10, then what is the average of x, yand z?

Updated On: Oct 1, 2024
  • 162316\frac{2}{3}
  • 30
  • 25
  • 171217\frac{1}{2}
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The Correct Option is B

Solution and Explanation

The correct option is (B): 30
Given that: arithmetic mean of x and y=40x \space and \space y= 40
x+y2=40\frac{x+y}{2}=40  ⇒ x+y=80x+y=80
given that z=10z=10
so A.M of x,y,z=x+y+z3x,y,z =\frac{x+y+z}{3}
80+103\frac{80+10}{3}=30= 30

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