SOLUTION: if A= {42,45,48,...,75}, how many subsets does A have ?

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Question 1019194: if A= {42,45,48,...,75}, how many subsets does A have ?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Assuming all of the numbers in A are in arithmetic sequence, A has ((75-42)/3) + 1 = 12 elements. The number of subsets of A is 2^12 = 4096.