Questions

Define the bit and byte used in computer memory.

Differentiate: Digital Integrity and Digital Reputation

Differentiate: Analogue Signal Transmission and Digital Signal Transmission

Differentiate: Analogue Signals and Digital Signals

Construct a quadrilateral ABCD in which AB=4.5cm, AC=CD=5cm, AD=6cm, and $\angle$BAC=60$^{\circ}$. Also, construct a triangle PBC whose area is equal to the area of the quadrilateral. Give the reason for being the area of the quadrilateral ABCD and the triangle PBC equal.

From a class having 12 boys and 18 girls, two students are selected randomly without sending the first student back to the class.

1. Define mutually exclusive events.
2. Show the probabilities of possible outcomes of selecting boys and girls in a tree diagram.
3. Find the probability of selecting both girls.
4. By how much the probability of getting at least one boy is less than the total probability? Calculate it.

Simplify: $\rm \frac {1}{x^2 - 5x + 6} + \frac {2}{4x - x^2 - 3}$

Solve: $\rm 2^{x - 2}+ 3^{3 - x} = 3$

The length of a rectangular plot is 8m more than its breadth. The area of the plot is 384 sq.m.

1. How many roots does the quadratic equation $\rm ax^2+bx+c=0, a\not = 0$ have? Write it.
2. What are length and breadth of the plot? Find it.
3. How long the plot should be decreased from its length to form it is a square plot? Calculate it.

The first and last term of an arithmetic series having some terms are 4 and 40 respectively. The sum of all terms is 220.

1. Write the formula to calculate the the sum of the first n terms of the series.
2. Find the total number of terms in the series.
3. What should be added to the third term of the series so that the first three terms form a geometric series? Find it.