Math with integers

Question

Suppose that you randomly choose three of

these four integers: 8, 8, 18, and 28. Is

the sum likely to be positive, negative, or 0? and why?

Answer 1

sum is certain to be positive

8,8,18, 28

sum of 3 would be either

8+18+28=56>0

8+8+18= 34>0

or

8+8+28=46>0

add positive numbers, the sum is always positive