If the number of elements in Y and Z are in the ratio 4 : 5, then what is the value of b?

If the number of elements in Y and Z are in the ratio 4 : 5, then what

1.	If the number of elements in Y and Z are in the ratio 4 : 5, then what is the value of b?
A.	18
B.	19
C.	21
D.	23
Answer» D. 23

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If the number of elements in Y and Z are in the ratio 4 : 5, then what is the value of b?

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