Question

7. If n(A - B) = 14, n(A U B) = 29 and n(A n B) = 9, then
n(B - A) is
(a) 5
(c) 7
(d) 10
(b) 6
no spam please ​

Answer 1

ANSWER:⤵️

6

Step-by-step explanation:⤵️

given,

n(A-B) =14

n(AUB) = 29

n(AnB) = 9

then,

n(A-B) = n(A)-n(AnB)

=> 14=n(A)-9

=> n(A) = 23

then,

n(AUB)=n(A)+n(B)-n(AnB)

=> 29=23+n(B)-9

=> n(B) = 15

then,

n(B-A)=n(B)-n(AnB)

=> n(B-A) = 15 -9

=> n(B-A) = 6

Answer 2

Answer:

can u answer plzzźzz for my questions

i'm from New Castle ( England)