Sonali applied for a job of Science teacher in a school. In the test for job, she scored 8 in Physics, 8 in Chemistry, 6 in Biology, and 6.5 in the interview. For calculating the final score, weightage of 2, 3, 3 and 4 were assigned to Physics, Chemistry, Biology and interview, respectively. What is the weighted average score of Sonali?

A. 7

B. 8.4

C. 7.2

D. 21

Answer: Option A

Solution(By Examveda Team)

$$\eqalign{ & {\text{Average score}} \cr & = \frac{{8 \times 2 + 8 \times 3 + 6 \times 3 + 6.5 \times 4}}{{2 + 3 + 3 + 4}} \cr & = \frac{{16 + 24 + 18 + 26}}{{12}} \cr & = \frac{{84}}{{12}} \cr & = 7 \cr} $$