This presentation covers a basic explanation of Probability and its concepts. It is useful for students of class 11 Mathematics and students preparing for the GRE QUANT and SAT exams. For a comprehensive detailed course on Probability which involves independent events, mutually exclusive events. Multiplication theorem and much more, you can refer to my course on Udemy, namely https://www.udemy.com/course/permutations-and-combinations-class-11-mathematics/?referralCode=8E0DCAB1DC56F4BC9B47

2. • We learn the basic concepts of Probability learnt in Classes 10 and 11.
• These are useful in the GRE QUANT section as well.

4. Question 1
A coin is tossed twice. What is the probability of getting at least one tail?

7. Question 2
If odds in favour of an event are 2:1, what is the probability of the event?

9. Question 3
If 6 persons sit in a row, what is the probability that A and B are sitting on adjacent
seats?

13. Question 4
2 cards are drawn at random from a well shuffled pack of 52 cards. Find the probability
that one is red and the other black.

17. Question 5
In a group there are 3 men and 2 women. 3 persons are selected at random. Find the
probability that the group consists of 1 man and 2 women or 2 men and 1 woman.

20. Question 6
Out of 8 points in a plane, 5 are collinear. Find the probability that 3 points selected at
random will form a triangle.

23. 5 𝐶2
× 3 𝐶1

26. o We have learnt the basic concepts of Probability.
o Odds in favour of or odds against.

27. Watch out for the next video on Laws of Probability.