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प्रश्न
If A = {x: x is natural number divisible by 2 and x< 16} and
B = {x:x is a whole number divisible by 3 and x < 18}, find: n(A – B)
उत्तर
A – B = {2, 4, 6, 8, 10, 12, 14} – {3, 6, 9, 12, 15, 18}
A - B = {2,4, 8, 10, 14}
n(A – B) = 5
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