In how many no. between 100 and 1000 exactly one of the digits is 3?  Choose the correct choice from the following options:  A) 648  B) 512  C) 252  D) 225  E) 26
Another approach can be   total nos. between 100 and 1000 are 899   nos. in which all digits are 3 = 1   nos. in which digit 3 is in two places = 8 + 9 + 9= 
<gadget id="calculator">8 + 9 + 9</gadget>
<output>26</output>
26 (for thousand , tens and once as different digit)   nos. in which no digit is 3= 8*9*9 - 1 = 648 - 1 (for 100 not to be included)   required nos = 899 - 1 - 26 - 647= 
<gadget id="calculator">899 - 1 - 26 - 647</gadget>
<output>225</output>
225   answer is 225
<result>D</result>
In how many no. between 100 and 1000 exactly one of the digits is 3?