Answer:
[tex] \boxed{ \bold{ \huge{ \bold{ \sf{6}}}}}[/tex]
Step-by-step explanation:
Given,
U = { 1 , 2 , 3 , 4 , 5 , 6 , 7 }
A = { 1 , 2 , 4 , 5 }
B = { 1 , 3 , 5 , 7 }
Finding A union B ( A ∪ B )
A ∪ B = { 1 , 2 , 4 , 5 } ∪ { 1 , 3 , 5 , 7 }
The union of two sets A and B is the set of all elements which belongs either A or B or both A and B.
Let's list the elements :
A ∪ B = { 1 , 2 , 3 , 4 , 5 , 7 }
In the question , we are asked to find out the number of elements present in A ∪ B
Now, count the Elements:
= 6
Thus, There are 6 elements in A ∪ B
Hope I helped !
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