A class obtained the following scores on a test.

Question

Test Score TestScore Frequency
90 1
80 6
70 10
60 3
50 2
40 3
What I did was
90+6(80)+7(10)+3(60)+2(50)+3(40)=1040 than divided by 25 which should give me the means it give me a fraction, I got the median right 70,mode right 70, and the range right 50. But I can not get the means right.

Answer 1

90+6(80)+10(70)+3(60)+2(50)+3(40)=1670

I'll leave the rest to you.