Question 61

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

Solution

Arithmetic mean of $$x$$ and $$y$$ = 40

=> $$x+y=80$$ ---------(i) and $$z=10$$

Average of $$x,y$$ and $$z$$ = $$\frac{(x+y+z)}{3}$$

= $$\frac{80+10}{3}=30$$

=> Ans - (B)

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