Secondary School (English Medium) (5 to 8) इयत्ता ८ - CBSE Question Bank Solutions for Mathematics

A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is:

red 

A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is: 

black 

A bag contains 5 red marbles, 8 white marbles, 4 green marbles. What is the probability that if one marble is taken out of the bag at random, it will be 

red

A bag contains 5 red marbles, 8 white marbles, 4 green marbles. What is the probability that if one marble is taken out of the bag at random, it will be

white

A bag contains 5 red marbles, 8 white marbles, 4 green marbles. What is the probability that if one marble is taken out of the bag at random, it will be 

not green

If you put 21 consonants and 5 vowels in a bag. What would carry greater probability? Getting a consonant or a vowel? Find each probability. 

If we have 15 boys and 5 girls in a class which carries a higher probability? Getting a copy belonging to a boy or a girl. Can you give it a value? 

If you have a collection of 6 pairs of white socks and 3 pairs of black socks. What is the probability that a pair you pick without looking is 

white?

If you have a collection of 6 pairs of white socks and 3 pairs of black socks. What is the probability that a pair you pick without looking is

black?

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? Is it the maximum?

When two dice are rolled:

List the outcomes for the event that the total is odd. 

When two dice are rolled:

Find probability of getting an odd total. 

When two dice are rolled: 

List the outcomes for the event that total is less than 5.

When two dice are rolled: 

Find the probability of getting a total less than 5?

A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is: 

a red card

In a simultaneous throw of a  pair of dice, find the probability of getting: 

 a number other than 5 on any dice.

The population of a city was 20,000 in the year 1997. It increased at the rate of 5% p.a. Find the population at the end of the year 2000.

What is the probability of choosing a vowel from the alphabets?

In a school only, 3 out of 5 students can participate in a competition. What is the probability of the students who do not make it to the competition?