If the mean of 5 (x + 1), (x + 3), (x + 5), (x + 7) and (x + 9) is given as 20, then find the value of Median.
Show answer & explanation
Correct answer: C
Explanation
Mean = ((x + 1) + (x + 3) + (x + 5) + (x + 7) + (x + 9))/5
= (5x + 25)/5
= x + 5
x + 5 = 20
x = 15
Therefore, the five observations are
16, 18, 20, 22, 24
Their median = 20