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How many distinct 5 digit numbers can be formed using the digits 3, 2, 3, 2, 4, 5 - Mathematics and Statistics

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प्रश्न

How many distinct 5 digit numbers can be formed using the digits 3, 2, 3, 2, 4, 5

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उत्तर

5 digit numbers are to be formed from 2, 3, 2, 3, 4, 5.

Case I: Numbers formed from 2, 2, 3, 4, 5 OR 2, 3, 3, 4, 5

Number of such numbers = `(5!)/(2!) xx 2`

= 5!

= 120

Case II: Numbers are formed from 2, 2, 3, 3 and any one of 4 or 5

Number of such numbers = `(5!)/(2!2!) xx 2`

= 60

Required number = 120 + 60

= 180

∴ 180 distinct 5 digit numbers can be formed using the digit 3, 2, 3, 2, 4, 5.

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पाठ 3: Permutations and Combination - Exercise 3.4 [पृष्ठ ५७]

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बालभारती Mathematics and Statistics 2 (Arts and Science) [English] Standard 11 Maharashtra State Board
पाठ 3 Permutations and Combination
Exercise 3.4 | Q 11 | पृष्ठ ५७
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