NCERT CBSE Class 10th Mathematics Chapter 15: Probability

Safalta Expert Published by: Sylvester Updated Wed, 22 Jun 2022 06:55 PM IST

Highlights

NCERT CBSE Class 10th Mathematics Chapter 15: Probability

The fifteenth chapter in Mathematics textbook is 'Probability'.
  • Theoretical probability associated with an event E is defined as “If there are ‘n’ elementary events associated with a random experiment and m of these are favourable to the event E then the probability of occurrence of an event is defined by P(E) as the ratio mn “.
    Probability Class 10 Notes Maths Chapter 15 1
  • If P(E) = 1, then it is called a ‘Certain Event’.
  • If P(E) = 0, then it is called an ‘Impossible Event’.
  • The probability of an event E is a number P(E) such that: 0 ≤ P(E) ≤ 1
  • An event having only one outcome is called an elementary event. The sum of the probabilities of all the elementary events of an experiment is 1.
  • For any event E, P(E) + P(E¯) = 1, where E¯ stands for ‘not E’. E and E¯ are called complementary events.
  • Favourable outcomes are those outcomes in the sample space that are favourable to the occurrence of an event.


The topics discussed in this chapter are as follows:

  • What is Probability?
  • Experimental Probability
  • Theoretical Probability
  • Elementary Event
  • Sum of events
  • Impossible and sure event
  • Geometric Probability

Free Demo Classes

Register here for Free Demo Classes

Please fill the name
Please enter only 10 digit mobile number
Please select course
Please fill the email

The probability that a number selected at random from the numbers 1, 2, 3, 4, …, 15 is a multiple of 4 is

1/5

If P(A) denotes the probability of an event then

0 ≤ P(A) ≤ 1

When a die is thrown, the probability of getting an odd number less than 3 is

1/6

Someone is asked to take a number from 1 to 100. The probability that it is a prime is

1/4

An event is very unlikely to happen. Its probability is closest to

0.0001

Free E Books