Julie cannot be right. That's because if you add three odd numbers together, you always get an odd number. The number 50 is an Even number.
Let's try adding 3 odd numbers together a couple of times...
3 + 3 + 3 = 9
5 + 1 + 5 = 11
7 + 3 + 5 = 15
We tried 3 examples, we could not get any even number. So, Julie's claim is wrong.