Скачать или смотреть Top 10 Permutation and Combination problems on forming numbers| Digit arrangement trick

Top 10 Permutation and Combination problems on forming numbers| Digit arrangement tricks

Arrangement of digits

Que 1: How many three-digit numbers can be formed with the digit 1, and 2,3,4,5?

Que 2: How many three-digit numbers can be formed with the digits 0, and 1,2,3,4?

Que 3: How many three-digit ‘Even Numbers’ can be formed with the digit 0, 1, and 2,3,4,5?

Que 4: How many numbers between 1800 and 4600 can be formed with the digits 0,1,2,3,4,5,6 and 7 if repetition is not allowed?

Que 5: How many three-digit numbers can be formed from the digits 0, 1, 2, 3, and 5 which are divisible by 3?

Que 6: Find the sum of the four-digit numbers formed from the digits 1, 2, 5, and 7 if repetition of the digits is not allowed?

Que 7: Find the sum of the four-digit numbers formed from the digits 0, 1, 2, 3, and 4 if repetition of the digits is not allowed?

Que 8: How many five-digit numbers can be formed from the digits 1, 2, 3, 4, and 5 such that the odd numbers do not occupy the odd places?

Que 9: How many four-digit numbers can be formed from the digits 0, 1, 3, 5, and 8 such that all numbers are divisible by 5?

Que 10: How many 5-digit numbers contain exactly two 4's in them?


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Timestamps:
00:00 Introduction
00:42 How many three-digit numbers can be formed
03:43 How many three-digit ‘Even Numbers’ can be formed
05:54 How many numbers between 1800 and 4600 can be formed
09:05 how many digits are divisible by 3
10:55 find the sum of the four-digit numbers
17:28 if odd numbers do not occupy the odd places
18:17 How many numbers are divisible by 5
20:15 Numbers that contain exactly two 4's in them
22:50 NCR Formula

Home Work Problem (Will be discussed in the next Video):
Que 1: How many such words can be formed from all the letters of the word PRACTICAL which start with a vowel and end with a consonant?

Que 2: How many ways do the letters of the word ‘PRACTICAL’ be arranged so that all vowels come at odd places only?

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