Question

a survey regarding the heights of the 50 girls of class x

was concluded

Height No of girls

120-130 2

130-140 8

140-150 12

150-160 20

160-170 8

Total 50

find mean mode and median​

Answer 1

Answer:

here uh firstly have to find xi of each class mark

formula of xi is

upper limit + lower limit by 2

then multiply fi with xi of each marks respectively

then by adding all the fixi

we get summation fixi

then apply formula of mean