The numbers DO differ by 10 if they are
- 1 and 11
- 2 and 12
- 3 and 13
- 4 and 14
- 5 and 15
Each outcome technically has two ways of occurring, but since we're taking two marbles at a time, that would be the same as saying, for instance, that drawing 1 and 11 is the same as drawing 11 and 1. We only count such an event once.
So the answer is (a) 5.
Answer:
Considerations:


Also,

A positive number divided by a positive number results in a positive quotient, and its opposite is always negative.
The fraction
can be described as a positive number divided by a negative number, which always result in a negative quotient.
The fractions have same value, so Liam is correct.
The answer for this question is 1080
52.22 - 39.58 = 12.64
12.64 / 4 = $ 3.16 per shirt