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 {3, 4, 5, 6, 7, 8, 9} Options.
A) 1  B) 2  C) 3  D) 4  E) 5
Given s=3t   t can take 3   and so s = 9   1 such pairs can be formed.   answer 1
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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 {3, 4, 5, 6, 7, 8, 9}