Find the median of the following data.
Class interval0−2020−4040−6060−8080−100Frequency51112139
Class IntervalFrequencyCumulative Frequency0−205520−40111640−60122860−80134180−100950
Median = l+(n2−cff)×h =40+25−1620×20=55
Find the mode of the following data.
Class0−2020−4040−6060−8080−100Frequency51112139