Three digit numbers in which the middle one is a perfect square ar | Filo
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Class 11

Math

Algebra

Permutations and Combinations

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Three digit numbers in which the middle one is a perfect square are formed using the digits to . Their sum is

Correct Answer: Option(a)
Solution:
Let be the number
      


Each possible choice for occurs. times 
Each possible choice for & occurs times 

    Sum of all numbers


   

Hence, this is the answer.
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