Question

1. in which data set below is the mean 3?

a. 2, 2, 2, 4, 5
b. 2, 2, 3, 4, 5
c. 1, 1, 1, 3, 4
d. 3, 3, 3, 3, 4

Explanation:

Step1: Calculate mean for Set A

Mean = $\frac{2+2+2+4+5}{5} = \frac{15}{5} = 3$

Step2: Verify other sets (optional check)

Set B mean: $\frac{2+2+3+4+5}{5} = \frac{16}{5} = 3.2$
Set C mean: $\frac{1+1+1+3+4}{5} = \frac{10}{5} = 2$
Set D mean: $\frac{3+3+3+3+4}{5} = \frac{16}{5} = 3.2$

Answer:

A. 2, 2, 2, 4, 5