Math Problem Statement

Find the value of​ n(A) if

​n(B)equals=3737​,

​n(A

intersect∩

​B)equals=1414​,

and​ n(A

union∪

​B)equals=6060.

Solution

To find the value of n(A)n(A), we can use the formula for the union of two sets:

n(AB)=n(A)+n(B)n(AB)n(A \cup B) = n(A) + n(B) - n(A \cap B)

We are given:

  • n(B)=37n(B) = 37
  • n(AB)=14n(A \cap B) = 14
  • n(AB)=60n(A \cup B) = 60

Substituting the known values into the formula, we have:

60=n(A)+371460 = n(A) + 37 - 14

Simplify:

60=n(A)+2360 = n(A) + 23

Subtract 23 from both sides:

n(A)=6023n(A) = 60 - 23

n(A)=37n(A) = 37

Therefore, the value of n(A)n(A) is:

37\boxed{37}

Would you like further details or have any questions about this solution?

Here are 5 related questions:

  1. What is the formula for the intersection of two sets if all other values are known?
  2. How do you find the number of elements in the complement of a set?
  3. Can this method be used for more than two sets? If so, how does it change?
  4. What does n(AB)n(A \cup B) represent in set theory?
  5. How would you find n(AB)n(A \setminus B) using the given information?

Tip: When solving problems involving sets, drawing a Venn diagram can be very helpful to visualize the relationships and intersections between sets.

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Math Problem Analysis

Mathematical Concepts

Set Theory
Union of Sets
Intersection of Sets

Formulas

n(A ∪ B) = n(A) + n(B) - n(A ∩ B)

Theorems

Principle of Inclusion-Exclusion

Suitable Grade Level

Grades 7-9