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probability of all 3 digit numbers having all the digits same is ___________..ans is 1/100..how?

Dear student,
3 digit numbers are from 100 to 999Hence there are 999-100+1=900 numbersNumbers having the same digits are:111222333444555666777888999Total of 9 numbersHence,probability of all 3 digit numbers having all the digits same=Number of numbers having all digits sameTotal number of numbers=9900=1100
 
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