Question

3. Calculate the mean for the following frequency distribution:
Marks 10-20 20-30 30-40 40-50 50-60 60-70 70-80
Frequency 3 7 10 6 8 2
4

Answer 1

here is your answer mate

The mean means average. To find it, add together all of your values and divide by the number of addends.

so the mean of the following distribution table =

10+20+30+40+50+60+70+80/8

=360/8

=290

hope it helps

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