Question

2,7,3,4
mean:
box
11,12,1,8
mean:
box
5,4,6,9
mean:
box

Explanation:

First Set (2, 7, 3, 4)

Step1: Sum the numbers

$2 + 7 + 3 + 4 = 16$

Step2: Divide by count (4)

$\frac{16}{4} = 4$

Step1: Sum the numbers

$11 + 12 + 1 + 8 = 32$

Step2: Divide by count (4)

$\frac{32}{4} = 8$

Step1: Sum the numbers

$5 + 4 + 6 + 9 = 24$

Step2: Divide by count (4)

$\frac{24}{4} = 6$

Answer:

4

Second Set (11, 12, 1, 8)