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use the venn diagram to determine the number of elements in the regions…

Question

use the venn diagram to determine the number of elements in the regions indicated below. b a or b b and c a

Explanation:

For region \( B \):

Step 1: Identify regions in \( B \)

Regions in \( B \) are the parts of circle \( B \): \( 12 \) (only \( B \)), \( 2 \) ( \( A \cap B \) not \( C \) ), \( 3 \) ( \( B \cap C \) not \( A \) ), \( 4 \) ( \( A \cap B \cap C \) ).

Step 2: Sum the values

\( 12 + 2 + 3 + 4 = 21 \)

Step 1: Identify regions in \( A \cup B \)

Regions in \( A \cup B \) are parts of \( A \) or \( B \): \( 10 \) (only \( A \) ), \( 12 \) (only \( B \) ), \( 2 \) ( \( A \cap B \) not \( C \) ), \( 4 \) ( \( A \cap C \) not \( B \) ), \( 3 \) ( \( B \cap C \) not \( A \) ), \( 4 \) ( \( A \cap B \cap C \) ).

Step 2: Sum the values

\( 10 + 12 + 2 + 4 + 3 + 4 = 35 \)

Step 1: Identify regions in \( B \cap C \)

Regions in \( B \cap C \) are parts common to \( B \) and \( C \): \( 3 \) ( \( B \cap C \) not \( A \) ), \( 4 \) ( \( A \cap B \cap C \) ).

Step 2: Sum the values

\( 3 + 4 = 7 \)

Answer:

\( 21 \)

For region \( A \) or \( B \) ( \( A \cup B \) ):