Marks | 1 | 2 | 3 | 4 | 5 |
Frequency | 2 | 2 | 8 | 4 | 4 |
The table above show the marks obtained in a given test.
Find the mean mark
3.1
3.0
3.2
3.3
Correct answer is D
Mark(χ) | f | fχ |
1 | 2 | 2 |
2 | 2 | 4 |
3 | 8 | 24 |
4 | 4 | 16 |
5 | 4 | 20 |
∑f = 20 | ∑fχ = 66 |
Mean=∑fx∑f
= 6620
= 3.3
If 2x : (x +1) = 3:2, what is the value of x?...
Which of the following is not an exterior angle of a regular polygon? ...
In the diagram, ∆XYZ is similar to ∆PRQ, |XY| = 5cm, |XZ| =3.5cm and |PR| = 8cm. Find |PQ| ...
The nth term of a sequence is Tn = 5 + (n - 1)2. Evaluate T4 - T6...
Find the derivatives of (2 + 3x)(1 - x) with respect to x ...