A final examination requires that a student answer any 4 ...
A final examination requires that a student answer any 4 out of 6 questions. In how many ways can this be done?
15
20
30
45
Correct answer is A
The question will be answered in
\(^5C_4 = \frac{6!}{(6-4)!4!}\\=\frac{6!}{2!4!}\\=\frac{6\times5\times4!}{2\times1\times4!}\\=15\hspace{1mm}ways\)
In the diagram, ∆XYZ is similar to ∆PRQ, |XY| = 5cm, |XZ| =3.5cm and |PR| = 8cm. Find |PQ| ...
If log\(_x\) 2 = 0.3, evaluate log\(_x\) 8....
For what value of x is \(\frac{4 - 2x}{x + 1}\) undefined. ...
A car travel at x km per hour for 1 hour and at y km per hour for 2 hours. Find its average speed...
In the diagram, PQRS is a parallelogram. Find the value of < SQR ...
In the diagram, QRT is a straight line. If angle PTR = 90°, angle PRT = 60°, angle PQR = 30&...