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The number of times the digit 3 will be written when listing the integers from 1 to 100 is want full solution a)302 b)300 c)296 d)271

The number of times the digit 3 will be written when listing the integers from 1 to 100 is


want full solution 


 


a)302   b)300   c)296    d)271

Grade:9

1 Answers

Aman Bansal
592 Points
10 years ago

Dear Hrishikesh

Take all the number as  digits ( 01 to 99)
i fill the units place with 3 , i can fill the ten and hundreds place in 10 ways
10 * 10 * 1 = 100

Same way for hundreds = 10 * 1 * 10 = 100
thousands = 1* 10* 10 = 100

So totally 300 ways

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