A={1,2,3,4) and B={a,e,i,o,u) are two sets. In how many ways can a number from a or a letter from B be chosen?

A={1,2,3,4) and B={a,e,i,o,u) are two sets. In how many ways can a num

1.	A={1,2,3,4) and B={a,e,i,o,u) are two sets. In how many ways can a number from a or a letter from B be chosen?
Answer» As no element of A is in B, we can apply the sum rule of disjoint counting. `thereforen(AcupB)=n(A)+n(B)=4+5=9`.

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A={1,2,3,4) and B={a,e,i,o,u) are two sets. In how many ways can a number from a or a letter from B be chosen?

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