Algebra
OpenStudy (anonymous):

If C = {integers divisible by 6 from 1 to 30} and D = {integers divisible by 3 from 1 to 20}, what is C ∩ D? {3, 6, 9, 12, 15, 18, 24, 30} {6, 12, 18, 24, 30} {6, 12, 18} { }

hero (hero):

When in doubt, write it out: C = {6, 12, 18, 24, 30} D = {3, 6, 9, 12, 15, 18} C ∩ D = ?

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