Question

Find the following data draw less than and more than ogive find median
class interval 10-20,20-30,30-40,40-50,50-60,60-70
frequency 3,9,15,30,18,8
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Answer 1

FREQUENCY =3,9,15,30,18,8

so mean =sum of observation÷no of observation

so mean=3+9+15+30+18+8÷6

=89÷6

=14.83

Hope it helps

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