Lecture-2

Permutations and Combinations Lecture 2
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00:00:08 Meaning of Permutations

00:05:47 Derivation for rule of Permutations

00:07:47 NCERT Exercise 7.3 Question 1

How many 3-digit numbers can be formed by using the digits 1 to 9 if no digit is repeated?

00:09:57 NCERT Exercise 7.3 Question 2

How many 4-digit numbers are there with no digit repeated?

00:17:47 NCERT Exercise 7.3 Question 3

How many 3-digit even numbers can be made using the digits 1, 2, 3, 4, 6, 7, if no digit is repeated?

00:20:57 NCERT Exercise 7.3 Question 4

Find the number of 4-digit numbers that can be formed using the digits 1, 2, 3, 4, 5 if no digit is repeated. How many of these will be even?

00:25:07 NCERT Exercise 7.3 Question 5

From a committee of 8 persons, in how many ways can we choose a chairman and a vice chairman assuming one person can not hold more than one position?

00:28:07 NCERT Exercise 7.3 Question 6

00:30:47 NCERT Exercise 7.3 Question 7

00:40:47 NCERT Exercise 7.3 Question 8

How many words, with or without meaning, can be formed using all the letters of the word EQUATION, using each letter exactly once?

00:45:47 NCERT Exercise 7.3 Question 9

How many words, with or without meaning can be made from the letters of the word MONDAY, assuming that no letter is repeated, if. (i) 4 letters are used at a time, (ii) all letters are used at a time, (iii) all letters are used but first letter is a vowel?

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