find the mean of the following data:

Marks: less than 0

less than 10

less than 20 less than 30 less than 40 less than 50
No. of students 0 7 19 32 42 50

 

Asked by bdroy_2014 | 25th Feb, 2018, 08:58: PM

Expert Answer:

begin mathsize 16px style table row Marks cell 0 minus 10 end cell cell 10 minus 20 end cell cell 20 minus 30 end cell cell 30 minus 40 end cell cell 40 minus 50 end cell row straight f 7 19 32 42 50 end table
space space space space space straight x space space space space space space space space space space space 5 space space space space space space space space space space 15 space space space space space space space space space space 25 space space space space space space space space space space 35 space space space space space space space space space space space 45
space space space space fx space space space space space space space space space space 35 space space space space space space space 285 space space space space space space space space space 800 space space space space space space space 1470 space space space space space 2250 space space space space space

Mean equals Σfx over Σf equals 4840 over 150 equals 32.27 end style

Answered by Rashmi Khot | 26th Feb, 2018, 10:17: AM