If the Arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is
A. 10
B. 12
C. 14
D. 16
Answer: Option D
Solution(By Examveda Team)
Arithmetic mean of 7, 5, 13, x and 9 = 10$$\eqalign{ & \Rightarrow \frac{{7 + 5 + 13 + x + 9}}{5} = 10 \cr & \Rightarrow 34 + x = 10 \times 5 \cr & \Rightarrow 34 + x = 50 \cr & \Rightarrow x = 50 - 34 \cr & \Rightarrow x = 16 \cr} $$
Related Questions on Progressions
Find the first term of an AP whose 8th and 12th terms are respectively 39 and 59.
A. 5
B. 6
C. 4
D. 3
E. 7
The sum of the first 16 terms of an AP whose first term and third term are 5 and 15 respectively is
A. 600
B. 765
C. 640
D. 680
E. 690
Join The Discussion