N(a)=30, n(b)=45, n(a∪b)=65 then find 1) n(a∩b) 2)n(a–b) 3) n(b–a)

Question

N(a)=30, n(b)=45, n(a∪b)=65 then find 1) n(a∩b) 2)n(a–b) 3) n(b–a)

in progress 0
Vivian 1 month 2021-08-13T00:33:03+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-13T00:34:20+00:00

    Step-by-step explanation:

    N(a)=30, n(b)=45, n(a∪b)=65

    1) we know that,n(aUb)=n(a)+n(b)-n(a∩b)

    =>65=30+45-n(a∩b)

    =>65=75-n(a∩b)

    =>-10=-n(a∩b)

    n(a∩b)=10

    (2)n(a-b)=n(a)-n(a∩b)

    n(a-b)=30-10

    n(a-b)=20

    (3)n(b-a)=n(b)-n(a∩b)

    n(b-a)=45-10

    n(b-a)=35

    0
    2021-08-13T00:34:55+00:00

    Answer:

    hope this helps you

    please mark as brainlest answer…

Leave an answer

Browse
Browse

18:9+8+9*3-7:3-1*13 = ? ( )