Question

15) 11. If Y is the smallest set such that Y U
{1, 2} = {1, 2, 3, 5, 9), then Y is equal to
(1 Marks)
A)
{1, 2, 3, 5, 9}
B)
{3, 5, 9}
c)
None of these
D)
{1, 2}
What is the right option for above

Answer 1

Answer

B) {3,5,9}

Step-by-step explanation:

Union of sets is the set of all elements of both sets common elements being taken only once.

here {1,2} is one set and {1,2,3,5,9} is answer set. So by comparing we come to know that Y={3,5,9}.

Thank you...!!

Answer 2

Answer:

option B is correct.

Step-by-step explanation:

Union of A and B is a set that contains every element present in either A or B or both.

In order to consider the smallest set Y which satisfies given condition, we consider that A and B are disjoint.

For 2 disjoint sets A and B, having Union U, we have

A = U - B

Here U = { 1, 2, 3, 5, 9} and B = { 1, 2},

B = { 3, 5, 9}.

Hence option B is correct.