Question

Let A = {10, 11, 12, 13, 14, 15, 16, 17, 18, 19} and B = {10, 12, 14, 16, 18}. Find the B' in A

Answer 1

Answer:

B' in A = {11, 13, 15, 17, 19}

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Answer 2

Answer:

{10+11+12+13+14+15+16+17+18+19}+{10+12+14+16+18}

so solve fast =145and70

=145 + 70

=215