Answers

2015-11-17T20:06:53+05:30
Each of the numbers from 300 to 399 inclusive has a 3 in the "hundreds" position. That makes 100.

Each number from 330 to 339 has a 3 in the tens position, That makes 10 more.

Then there are 10 numbers (303, 313, 323, .... 393) with a 3 in the units position. That's another 10.

So I make it 120 altogether.
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