The table gives the frequency of grades achieved by students in an IB school a Calculate the mean grade. b What percentage of students achieved a grade 4 or 57. c Write down the modal grade. Grade Frequency 1 1 2 6 3 19 4 34 5 32 6 18 7 10

The table gives the frequency of grades achieved by students in an IB school 

a Calculate the mean grade. 

b What percentage of students achieved a grade 4 or 57.

c Write down the modal grade.

                       

Grade	Frequency
1	1
2	6
3	19
4	34
5	32
6	18
7	10

Expert Answer

a).The mean grade. Total frequency=1+6+19+34+32+18+10=120 sum=1*1+2*6+3*19+4*34+5*32 View the full answer