Question

If XUY has 18 elements ,x has 8 and y has 15 elements, how many elements does X'UY' have!​

Answer 1

Answer:

5 is your ans ok tilakk1432

Step-by-step explanation:

It is given that,

n(X∪Y)=18,n(X)=8,n(Y)=15

n(X∩Y)= ?

We know that,

n(X∪Y)=n(X)+n(Y)–n(X∩Y)

∴18=8+15−n(X∩Y)

⇒n(X∩Y)=23–18=5

∴n(X∩Y)=5

hope it will help you

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