Answer:
since there are 30 students as a whole and 20 boys make up part of the class, you can assume that there are 10 girls in the class. since the mean mark for boys is 62 I think the mean mark for girls would be 8%
Step-by-step explanation:
Answer: I think b=5
Step-by-step explanation:
Answer:
11
Step-by-step explanation:
4 plus 7 is 11
Answer:
450
Step-by-step explanation:
207/500 is already in simplest form