Question

CI - 31-40,41-50,51-60,61-70,71-80,81-90,91-100 .f -0,6,2,3,1,4,4.find the mean .

Answer 1

$\frak{ \frac{(9 \times 0) + (9 \times 6) + (9 \times3) +(9 \times 1) + (9 \times 4) + (9 \times 4)}{63} }\\ \\ \frak{ \rightarrow \frac{0 + 54 + 27 + 9 + 36 + 36}{63} }\\ \\ \frak {\rightarrow \frac{162}{63} = \huge \red{2.57} \: \: \: or \: \: \red{2.6}}$