The mean mark is 70% there are 30 students 20 of which are boys with a mean mark if 62% what is the mean for girls
1 answer:
Answer:
This problem can be solved by working backwards.
Average of 30 students = 70.
Total marks of all the 30 students = 30x70 = 2100
Out of these 30, average of 20 students = 62
Total marks of these 30 students = 30x62 = 1860
So the total marks of the remaining 10 students = 2100-1860 = 240
Hence the average of the remaining 10 students = 240/10 = 24
You might be interested in
Answer:
I think d no p=4 and q=5
Step-by-step explanation:
this might help you
Answer:

Step-by-step explanation:

Multiply both sides by 4:


Divide both sides by 3:


Answer:
The answer to the question provided is letter D.
Answer:
I think it 7 ok ok ok ok ok ok