Find the unknown entries (a,b,c,d,e,f,g) from the following frequency distribution of heights of 50 students in a class: Class intervals (heights in cm)              Frequency                                      Cumulative Frequency 1250-155 155-160 160-165 165-170 170-175 175-180           12 b 10 d e 2          a 25 c 43 48 f Total                              g

Explanation

On comparing last two tables, we get
`a=12`
`a+b=25`
`=>12+b=25`
`=>b=25−12=13`
`22+b=c`
`=>c=22+13=35`
`22+b+d=43`
`=>22+13+d=43`
`=>d=43−35=8`
`22+b+d+e=48`
`=>22+13+8+e=48`
`=>e=48−43=5`
`24+b+d+e=f`
`=>f=24+13+8+5=50`