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rakeshd347 wrote:In society A, it's only acceptable to name one's children one of 10 acceptable names, either for the child's first name or for the child's middle name, though some children are not given any middle name, and it's not considered acceptable to give the child the same first and middle name. When a new child is born in society A, how many possible names can the parents consider for their child?
A 10
B 45
C 90
D 100
E 110
Number of possibilities with first and middle name = 10C2 * 2 = 10*9/2*2 = 90rakeshd347 wrote:In society A, it's only acceptable to name one's children one of 10 acceptable names, either for the child's first name or for the child's middle name, though some children are not given any middle name, and it's not considered acceptable to give the child the same first and middle name. When a new child is born in society A, how many possible names can the parents consider for their child?
A 10
B 45
C 90
D 100
E 110
Thats correct the OA is D guys.rakeshd347 wrote:In society A, it's only acceptable to name one's children one of 10 acceptable names, either for the child's first name or for the child's middle name, though some children are not given any middle name, and it's not considered acceptable to give the child the same first and middle name. When a new child is born in society A, how many possible names can the parents consider for their child?
A 10
B 45
C 90
D 100
E 110
