# Answer on Discrete Mathematics Question for BABATUNJI ABDULWAHAB

Question #72570

5. Let A = {x, y}, B = {1,2}. Find the Cartesian products of A and B: A x B? (Hint: the result will be a set of pairs (a, b) where a ∈ A and b ∈ B).

6. Which if the following sets are equal?

a) {a, b, c, d}

b) {d, e, a, c)

c) {d, b, a, c}

d) {a, a, d, e, c, e}

7. What is the cardinality of each of the following sets?

a) { }

b) { { } }

c) {a, {a}, {a, {a}} }

8. How many different license plates can be made if each plate contains a sequence of three upper case English letters followed by three digits (and no sequences of letters are prohibited, even if they are obscene)?

6. Which if the following sets are equal?

a) {a, b, c, d}

b) {d, e, a, c)

c) {d, b, a, c}

d) {a, a, d, e, c, e}

7. What is the cardinality of each of the following sets?

a) { }

b) { { } }

c) {a, {a}, {a, {a}} }

8. How many different license plates can be made if each plate contains a sequence of three upper case English letters followed by three digits (and no sequences of letters are prohibited, even if they are obscene)?

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