If λ is the number of four digit numbers that can be formed by using the digits 1,2,3,4,5,6,7,8 and 9 such that the least digit used is 4,(Repetition of digits is allowed) then the value of λ3is
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answer is 0223.00.
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Detailed Solution
If repetion allowedλ= Required number of numbers =64−54 =671∴λ3=6713=223.66
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If λ is the number of four digit numbers that can be formed by using the digits 1,2,3,4,5,6,7,8 and 9 such that the least digit used is 4,(Repetition of digits is allowed) then the value of λ3is