Can someone ?
if 3∈a and 3b, then which of the following statements is not true?
a: 3 is an element of b complement.
b: 3 is an element of a∪b.
c: 3 is an element of a∩b.

Option A and C are not true.

Step-by-step explanation:

As shown in Venn diagram attached

A. 3∉B which states 3 is the element which doesn't belong to B so this option is not true.

B. 3∈(A∪B)

Since 3∈A and 3∉B therefore 3∈(A∪B)

Statement is true.

C. 3∈A and 3∉B so 3∉(A∩B) because 3 is not the common element of A∩B.

Therefore this option is not true.

Therefore Options A and C are not true.

the answer is 15% decrease

if x = 1, then the answer is 3.5