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Let A and B are two sets such that A xx ...

Let A and B are two sets such that `A xx B` consists of 6 elements. If three elements of `A xx B = {(1, 2), (2, 3), (4, 3)}` then the remaining order pairs of `A xx B` are

A

(1, 3), (2, 2), (4, 2)

B

(3, 1), (2, 2), (4, 2)

C

(3, 1), (2, 4), (2, 2)

D

(1, 3), (2, 2), (2, 4)

Text Solution

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The correct Answer is:
To solve the problem, we need to find the remaining ordered pairs in the Cartesian product \( A \times B \) given that it consists of 6 elements and 3 of those elements are already provided. ### Step-by-Step Solution: 1. **Identify the Given Ordered Pairs**: We are given the ordered pairs: \[ (1, 2), (2, 3), (4, 3) \] This means we have 3 elements already in \( A \times B \). 2. **Determine the Elements of Sets A and B**: From the given ordered pairs, we can identify the elements of sets \( A \) and \( B \): - From \( (1, 2) \): \( 1 \in A \) and \( 2 \in B \) - From \( (2, 3) \): \( 2 \in A \) and \( 3 \in B \) - From \( (4, 3) \): \( 4 \in A \) and \( 3 \in B \) Thus, we can deduce: \[ A = \{1, 2, 4\}, \quad B = \{2, 3\} \] 3. **Count the Elements in Sets A and B**: - The number of elements in \( A \) is 3. - The number of elements in \( B \) is 2. 4. **Calculate the Total Number of Ordered Pairs**: The total number of ordered pairs in \( A \times B \) is given by: \[ |A| \times |B| = 3 \times 2 = 6 \] This confirms that our sets are correct. 5. **List All Possible Ordered Pairs**: The complete set of ordered pairs in \( A \times B \) can be generated as follows: - For \( 1 \in A \): \( (1, 2), (1, 3) \) - For \( 2 \in A \): \( (2, 2), (2, 3) \) - For \( 4 \in A \): \( (4, 2), (4, 3) \) Thus, the complete set of ordered pairs is: \[ (1, 2), (1, 3), (2, 2), (2, 3), (4, 2), (4, 3) \] 6. **Identify the Remaining Ordered Pairs**: We already have the pairs \( (1, 2), (2, 3), (4, 3) \). The remaining pairs from our complete list are: \[ (1, 3), (2, 2), (4, 2) \] ### Final Answer: The remaining ordered pairs of \( A \times B \) are: \[ (1, 3), (2, 2), (4, 2) \]
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