Consider the following Venn diagram, where X, Y and Z are three sets. Let the number of elements in Z be denoted by n(Z) which is equal to 90. If the number of elements in Y and Z are in the ratio 4 : 5, then what is the value of b?
Consider the following Venn diagram, where X, Y and Z are three sets. Let the number of elements in Z be denoted by n(Z) which is equal to 90.
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 is the value of b?Options
- a.
18
- b.Correct answer
19
- c.
21
- d.
23
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