Find the mean height of persons from the following data.

Height (cm)	Number of persons
120	3
130	4
140	5
150	6
160	2

Correct option is D

Given:

Formula Used:
​$$\text{Mean Height} = \frac{\text{Sum of products of height and number of persons}}{\text{Total number of persons}}$$​​
Solution:
Total height = 120×3 + 130×4 + 140×5 + 150×6 + 160×2 = 2800 cm
Total number of persons = 3 + 4 + 5 + 6 + 2 = 20
Mean height =$$\frac{2800}{ 20}$$​= 140.00 cm
The mean height of the persons is 140.00 cm.