Secondary School (English Medium) (5 to 8) Class 8 - CBSE Question Bank Solutions for Mathematics

List the outcomes you can see in this experiment.

Spinning a wheel

List the outcomes you can see in this experiment.

Tossing two coins together

When a die is thrown, list the outcomes of an event of getting a prime number.

When a die is thrown, list the outcome of an event of getting a number greater than 5.

Find the probability of the pointer stopping on D.

Find the probability of getting an ace from a well shuffled deck of 52 playing cards.

Find the probability of getting a red apple.

Numbers 1 to 10 are written on ten separate slips (one number on one slip), kept in a box and mixed well. One slip is chosen from the box without looking into it. What is the probability of.

1. Getting a number 6?
2. Getting a number less than 6?
3. Getting a number greater than 6?
4. Getting a 1-digit number?

If you have a spinning wheel with 3 green sectors, 1 blue sector and 1 red sector, what is the probability of getting a green sector? What is the probability of getting a non blue sector?

Find the probabilities of the events given in Question 2.

The population of a place increased to 54000 in 2003 at a rate of 5% per annum Find the population in 2001.

The population of a place increased to 54,000 in 2003 at a rate of 5% per annum. what would be its population in 2005?

In a laboratory, the count of bacteria in a certain experiment was increasing at the rate of 2.5% per hour. Find the bacteria at the end of 2 hours if the count was initially 5,06,000.

A scooter was bought at Rs 42,000. Its value depreciated at the rate of 8% per annum. Find its value after one year.

Simplify.

(x² − 5) (x + 5) + 25

Simplify.

(a² + 5) (b³ + 3) + 5

Simplify.

(t + s²) (t² − s)

Simplify.

(a + b) (c − d) + (a − b) (c + d) + 2 (ac + bd)

Simplify. 

(x + y) (2x + y) + (x + 2y) (x − y)

Simplify.

(x + y) (x² − xy + y²)