23 boys and 22 girls take a maths test. The mean mark for the boys was 44. The mean mark for the girls was 42. Find the mean mark for all 45 students. how to solve Step by step
Answers
Answered by
0
Answer:
68 boys and 39 girls take a biology test.
The mean mark for the boys was 27
The mean mark for the girls was 84
(27*68 + 84*39) / 107 = 5112/107
23 * 44 = 1012
22 * 42 = 924
total : 1,936 mean mark 43 1/45
Step-by-step explanation:
Similar questions