The number of 4 digit number that can be formed from the digits 0, 1, 2, 3, 4, 5, 6, 7 so that each number contains digit 1 is

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The number of 4 digit number that can be formed from the digits 0, 1, 2, 3, 4, 5, 6, 7 so that each number contains digit 1 is

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The number of 4 digits number that can be form from the digits 0,1,2,3,4,5,6,7 so that the each number contains digit 1 is Given the number of digit numbers, the first digit can't be 0.Let (i) first digit is (1).(ii) first digits is not 1(i) First digit is 1We pick 3 digits in order out of the remaining 7.6.5=210 possibilities.(ii) First digit is not 1There are 6 ways to choose the first digit (2,3,4,5,6,7), 3 ways to place the digit 1 (hundreds, tens, ones)and 6.5 ways to choose the other digits So 6.3.6.5=540 possibilities∴ total possibilities are 210+540=750750 possibilities to choose the number that to each number contains digit 1

Question Text	The number of 4 digit number that can be formed from the digits 0, 1, 2, 3, 4, 5, 6, 7 so that each number contains digit 1 is
Answer Type	Text solution:1
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The number of 4 digit number that can be formed from the digits 0, 1, 2, 3, 4, 5, 6, 7 so that each number contains digit 1 is

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