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If n(AtimesB)=20 and n(A)=5 then n(B)=...

If `n(AtimesB)=20 and n(A)=5` then `n(B)=`

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The correct Answer is:
`4`
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If n(A)=50, n(B)=35, n(A cap B)=5," then n(A cup B) is equal to .........."

(i)If n(A)=25, n(B)=40, n(A cup B)=50 and n(B')=25," find "n(A cap B) and n(U) . (ii) If n(A)=300, n(A cup B)=500, n(A cap B)=50 and n (B')=350 , find n(B) and n(U) .

Knowledge Check

  • If n(AtimesB)=6 and A={1,3} , then n(B) is

    A
    `1`
    B
    `2`
    C
    `3`
    D
    `6`

  • If n(A)=p and n(B)=q then n(AtimesB) ____.

    A
    `p+q`
    B
    `p-q`
    C
    `ptimesq`
    D
    `(p)/(q)`

  • If n(A)=43, n(B)=51 and n(A cup B)=75, then n((A-B) cup (B-A))=

    A
    53
    B
    45
    C
    56
    D
    66

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    If n (A xx B) =24 and A = {1,3,5,7} then n (B) is

    Let n(U)=700, n(A)=200, n(B)=300 and n(A cap B)=100, then n( A^(c)capB^(c) )=

    If n(U)=70, n(A)=25, n(B)=30, n(A cap B)=5," then "n(A cup B)' is..........

    If n (A) =5 and n(B ) =7 , then the number of relations on A xx B is

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