Question 30

If the Arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is

Arithmetic mean of 7, 5, 13, x and 9 = 10

=> $$\frac{(7+5+13+x+9)}{5}=10$$

=> $$34+x=10 \times 5=50$$

=> $$x=50-34=16$$

=> Ans - (D)

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