How many different pairs of numbers (s, t) such that s = 3t can be obtained if s and t are selected from the set of number {0, 1, 2, 3, 4, 5, 6, 7, 10, 11}  Choose the correct answer:
A) 1  B) 2  C) 3  D) 4  E) 5
Given s=3t   t can take 0,1,2   and so s = 0,3,6   3 such pairs can be formed.   answer 3
<result>C</result>
How many different pairs of numbers (s, t) such that s = 3t can be obtained if s and t are selected from the set of number {0, 1, 2, 3, 4, 5, 6, 7, 10, 11}