Math Problem Statement

Given the following Venn diagram, find  n[ A ∪ ( B ∩ C )c ].

 91

 90

 95

 93

 96

 None of the above.

Given the following Venn diagram, find n[ A ∪ ( B ∩ C )c ].

Solution

To solve the problem of finding n[A(BC)c]n[ A \cup (B \cap C)^c ] using the given Venn diagram, we will break it down step by step:

  1. Interpretation of the problem:

    • A(BC)cA \cup (B \cap C)^c means the union of set AA with the complement of the intersection of sets BB and CC.
    • (BC)c(B \cap C)^c is everything outside the intersection of sets BB and CC.
  2. Step-by-step approach:

    • First, identify BCB \cap C from the diagram:
      • The intersection of BB and CC is the area that includes 24, 17, and 12 (shared between BB and CC).
      • So, BC={12,24,17}B \cap C = \{12, 24, 17\}.
    • Next, find (BC)c(B \cap C)^c, which includes:
      • Everything except the elements 12, 24, and 17. Therefore, (BC)c={10,13,3,10,21}(B \cap C)^c = \{10, 13, 3, 10, 21\}.
    • Now, find A(BC)cA \cup (B \cap C)^c, which is:
      • The union of set AA and (BC)c(B \cap C)^c.
      • Set AA includes: {10,13,12,24}\{10, 13, 12, 24\} (from the diagram).
      • The union of AA with (BC)c(B \cap C)^c gives {10,13,12,24,3,21}\{10, 13, 12, 24, 3, 21\}.
  3. Counting the elements:

    • Unique elements in A(BC)cA \cup (B \cap C)^c are {10,13,12,24,3,21}\{10, 13, 12, 24, 3, 21\}.
    • The total number of unique elements is 6.
  4. Total count of elements in the universal set:

    • Add all the values in the universal set: 10+13+12+24+10+17+3+21=11010 + 13 + 12 + 24 + 10 + 17 + 3 + 21 = 110.
    • Now subtract the elements of BCB \cap C, which are: 12+24+17=5312 + 24 + 17 = 53.
    • Subtract these from the total: 11053=57110 - 53 = 57.

Thus, the answer is none of the provided options.

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Math Problem Analysis

Mathematical Concepts

Set Theory
Union of Sets
Intersection of Sets
Complement of a Set

Formulas

A ∪ (B ∩ C)^c
Union of A with the complement of the intersection of B and C

Theorems

Union and Intersection Theorems in Set Theory

Suitable Grade Level

High School (Grades 9-12)