The mean of 1, 3, 5, 7 and x is 4. Find the value of x
A
2
B
4
C
6
D
8
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
Mean = \(\frac{\sum x}{n}\)
4 = \(\frac{1 + 3 + 5 + 7 + x}{5}\)
4 x 5 = 16 + x
20 - 16 = x
4 = x
x = 4
Source: Myschool Past Questions Archive (Record #49352)