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If A and B are two disjoint sets and n (...

If A and B are two disjoint sets and n (A) = 15 and n (B) = 10 find n `(AcupB),N(AcapB).`

Text Solution

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The correct Answer is:
` n(A cap B) =0`
` n( A cup B)= 25`
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Knowledge Check

  • If A and B are not disjoint sets, then n(A uu B)=

    A
    1.`n(A)+n(B)`
    B
    2.`n(A)+n(B)-n(A nn B)`
    C
    3.`n(A)+n(B)+n(A nn B)
    D
    4.`n(A) . n(B)`

  • If A and B are any two finite sets then n (A) + n (B) is equal to

    A
    `n (A uu B)`
    B
    `n(A nn B)`
    C
    `n (A uu B) + n (A nn B)`
    D
    `n (A uu B) - n (A nn B)`

  • If A and B are two sets such that n (A) = 70 , n (B) = 60 and n (A uu B) = 110 , then n (A nn B)

    A
    240
    B
    50
    C
    40
    D
    20

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