Question 7
Measures of Central TendencyThirty boys and x girls sat for a test. The mean of the boys' scores and that of the girls were respectively 6 and 8. Find x if the total score was 468.
- A.38
- B.24
- C.36
- D.22
- E.41.
Show the answer and explanation
Answer: C (36)
Explanation
The boys scored 30 × 6 = 180 in total, so the girls scored 468 − 180 = 288. 288 ÷ 8 = 36 girls.