Question

A and B are two sets , AUB ={1,3,4,5,6,7,9} and A-B ={3,4,6} then find set B​

Answer 1

1,5,7,9 is the set of B ok

Answer 2

Answer:

Set B = { 1, 5, 7, 9 }

Step-by-step explanation:

Given,

AUB = { 1, 3, 4, 5, 6, 7, 9 } and A-B = { 3, 4, 6 },

Since, The elements in B = The common elements in both A and B - The element in A that are not in set B

⇒ B = ( AUB ) - ( A-B )

= { 1, 3, 4, 5, 6, 7, 9 } -  { 3, 4, 6 }

= { 1, 5, 7, 9 }

Hence, the set B = { 1, 5, 7, 9 }