Question

Calculate A/B if A ={3,6,9,12,15,18,21},{4,8,12,16,20}

Answer 1

Answer:

A={3,6,9,12,15,18,21}

B={4,8,12,16,20}

C={2,4,6,8,10,12,14,16}

D={5,10,15,20}

(i) A−B={3,6,9,15,18,21}

(ii) A−C={3,9,15,18,21}

(iii) A−D={3,6,9,12,18,21}

(iv) B−A={4,8,16,20}

(v) C−A={2,4,8,10,14,16}

(vi) D−A={5,10,20}

(vii) B−C={20}

(viii) B−D={4,8,12,16}

(ix) C−B={2,6,10,14}

(x) D−B={5,10,15}

(xi) C−D={2,4,6,8,12,14,16}

(xii) D−C={5,15,20}

Step-by-step explanation:

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Answer 2

Solution :-

given that,

→ A = {3,6,9,12,15,18,21}

→ B = {4,8,12,16,20}

we know that,

• A/B = A - (A∩B) = A - B

so,

→ A - B = The set of elements belongs to A but not belongs to B. { The elements that belong to A only. }

then,

→ A - B = {3, 6, 9, 15, 18, 21} (Ans.)

Learn more :-

If n (AUB)=70,n(A)37,n(B)=52, Find AUB (a)19. (b)20. (c)21. (d)24

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