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:
5 1/2
Step-by-step explanation:
add -2 and 7 bc negative and negative makes positive making it 5
then add 1/6 and 1/3 but they have to have the same denominator so u multiply 2 to 1/3 which makes it 2/6 and 2/6 + 1/6= 3/6 which simplify to 1/2
7/20 * 2/3 = 14/60 = 7/30
Now, 7/30 / 21/4
= 7/30 * 4/21 = 28/630 = 14/315
In short, Your Answer would be 14/315
Hope this helps!