Question

Find n(B), if N(A)=25 n(AUB)=45 n(A int B)=10​

Answer 1

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$\huge\star\pink{given}$

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n(A) =25

n(A U B) =25

n(A int B) =10

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$\huge\star\pink{find}$

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n(B) =?????

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$\huge\star\pink{solve}$

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we know

n(A U B) =n(A) +n(B) -n(A int B)

n(B) =n(A U B) -n(A) + -n(A int B)

n(B) =45-25+10

n(B)=55-25

n(B)=30

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n(B) =30

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I hope it helps plz mark as brainlist