Question

the height of 72 plants in a garden are given below. Make two columns in height and no of plants
height(in cm):58 60 62 64 66 68
no: of plants :12 14 20 13 08 05
i)find the mean height.

Answer 1

$$\begin{gathered} \mathrm{Hi}, \\ \begin{array}{cc}\mathrm{Height}& \mathrm{Nos}.\mathrm{of}\mathrm{plants}\end{array} \\ \begin{array}{cc}58& 12\\ 60& 14\\ 62& 20\\ 64& 13\\ 66& 8\\ 68& 5\end{array} \\ \mathrm{The}\mathrm{mean}\mathrm{of}\mathrm{the}\mathrm{heights}\mathrm{will}\mathrm{be} \\ =\frac{58\times 12+60\times 14+62\times 20+64\times 13+66\times 8+68\times 5}{12+14+20+13+8+5} \\ =\frac{4476}{72}=61.167\mathrm{unit} \end{gathered}$$