Q. How many times does the digit 6 appear while writing integers from 400 to 900 ?
A) 201
B) 150
C) 170
D) 200
Ans. D) 200
The digit 6 appear 200 times while writing integers from 400 to 900.
Explanation:
This question can be solved by using permutations method.
Permutation method is used to multiply higher level calculations.
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