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

4, 16, 30, 20, 10, 14 and 26 are represented on a pie chart. Find the sum of the angles of the bisec...

Factorize completely 81a$^4$ - 16b$^4$...

I am x years old and my brother is 3 years older how old was my brother last year ...

The sum of the interior angles of a pentagon is 6x + 6y. Find y in the terms of x ...

Simplify: 16$^{\frac{5}{4}}$ x 2$^{-3}$ x 3$^0$...

Find the equation of the line through the points (5, 7) parallel to the line 7x + 5y = 12. ...

From the diagram above, find the required roots/region of x. ...

If two triangles are similar, which of the following is true? Their ...

A school boy lying on the ground 30m away from the foot of a water tank towel observes that the angl...

Find all real numbers x which satisfy the inequality $\frac{1}{3}$(x + 1) - 1 > $\frac{1}{5}$...