Ok here is the table I am given.

Mark Intervals Number of Learners

30-39 2

40-49 5

50-59 20

60-69 42

70-79 25

80-89 5

90-99 3

Then I did the a cumulative frequency and represented the data on an Ogive.

I was then asked to read off the Median from the Ogive which was also straight forward.

Then I was asked to calculate the ACTUAL median.

Any help on how to calculate it?

What I did was (100 + 1)/2 and got 50.5th value which would be in the 60-69 interval and I gave that as my answer? Is that correct? If not, how would I do this problem.

Thanks for the help in advance