The mean heights of 3 groups of students consisting of 20, 16 and 14 students are 1.67m, 1.50m and 1.40m Respectively. What is the mean height of all the students?

Similar Questions

A chord is 2cm from the centre of a circle. If the radius of the circle is 5cm, find the length of t...

If the volume of a cube is (8 x 103)cm\(^3\), what is the surface area the cube?...

Solve x2 − 2x − 3 = 0...

If the simple interest on a sum of money invested at 3% per annum for 2\(\frac{1}{2}\)  ye...

Simplify (0.09)2 and give your answer correct to 4 significant figures...

Given the matrix \(A = \begin{vmatrix} 3 & -2 \\ 1 & 6 \end{vmatrix}\). Find the inverse of ...

Ada draws the graph of y = x2 - x - 2 and y = 2x - 1 on the same axes. Which of these equations is s...

The ages of students in a small primary school were recorded in the table below.  Age&nb...

In how many ways can a student select 2 subjects from 5 subjects?...

Which of the following equations has its roots as 4 and -5?...