Question

the numbers 1, 2, 3, and 4 have weights 0.1, 0.2, 0.3, and 0.4 respectively. compute the weighted average. (to the nearest tenth)
a 2.6
b 2.8
c 3.0
d 3.2

Explanation:

Step1: Multiply each number by weight

$1\times0.1 = 0.1$, $2\times0.2 = 0.4$, $3\times0.3 = 0.9$, $4\times0.4 = 1.6$

Step2: Sum the weighted values

$0.1 + 0.4 + 0.9 + 1.6 = 3.0$

Step3: Round to nearest tenth

$3.0$ (already to nearest tenth)

Answer:

C. 3.0