Answers

2014-09-07T16:06:59+08:00
Only 8 students didnt take neither Physics nor Calculus and thats 20%.
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wow, she knows the answer, thanks a lot ! :)
The easiest way to get percentages is dividing the 40 by 10= 4. And 4 is the 10% of 40, so you just multiply. So 40% of 40 is 16 and 30% is 12 then 10% is 4. Thats when you can get 8 as 20%.
2014-09-07T16:16:58+08:00
Physics 16
calculus 12
both 4
16+12-4 = 24 took the exam
so 16 didnt take any
1 5 1