Calculate the mean, variance and standard deviation for the following distribution: Class 30-40...

Описание: Question From - NCERT Maths Class 11 Chapter 15 SOLVED EXAMPLES Question – 10 STATISTICS CBSE, RBSE, UP, MP, BIHAR BOARD

QUESTION TEXT:-
Calculate the mean, variance and standard deviation for the following distribution: Class 30-40 40-50 50-60 60-70 70-80 80-90 90-100 Frequency 3 7 12 15 8 3 2

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