HELP THIS IS VERY IMPORTANT!

How many integers between 200 and 300 have the sum of their digits equal to 15?

 

First decide how many combinations of 2 digits make 13

	+13
2	94,49
2	85,58
2	76,67

 

So the only numbers are 

249

294

258

285

267

276

 

So that makes  6 integers