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Bunuel
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From 1 to 9: 1 three

From 10 to 99:

Case 1: _, 3 = 8 * 1 = 8 ways

Case 2: 3, _ = 1 * 9 = 9 ways

Case 3: 3 , 3 = 1 * 1 = 1 ways

Total: 18 ways


From 100 to 200:

Case 1: 1 , _ , 3 = 1 * 9 * 1 = 9 ways

Case 2: 1, 3, _ = 1 * 1 * 9 = 9 ways

Case 3: 1 , 3, 3 = 1 * 1 * 1 = 1 ways

Total : 9 + 9 + 1 = 19 ways

Overall ways: 1 + 18 + 19 = 38

Answer D
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Can you pls clear this, I am getting 40 3's

1-9 :- 1 (03)
10-99 :- 19 ( 30,31,32,33,34,35,36,37,38,39) + (13,23,43,53,63,73,83,93)
100-199 :- 20 (103,113,123,143,153,163,173,183,193) + (130...139)
Total:- 40

can you guys comment on where i made mistake?
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Can you pls clear this, I am getting 40 3's

1-9 :- 1 (03)
10-99 :- 19 ( 30,31,32,33,34,35,36,37,38,39) + (13,23,43,53,63,73,83,93)
100-199 :- 20 (103,113,123,143,153,163,173,183,193) + (130...139)
Total:- 40

can you guys comment on where i made mistake?

You actually got 38 but miscounted in 10-99 and 100-199.
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