111.Homework2

# 111.Homework2 - Homework#2 ITI 111 Sets Precision and...

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Homework #2 ITI 111 Sets, Precision and Recall Sets, Precision and Recall Union and Intersection 1. If we are given the information that |A|=200; |B|=400; and |A B|=100, what can we say about |A B| ? a. it is less than 400 because the intersection is not empty b. it is at least 600 c. it is 500 d. It is 800, because 2x4=8 e. there is not enough information to determine it. 2. If we know that that A={10, 20, 30, 50}; B={20, 60, 70, 80}; C={10, 100, 80, 20} then (A B) C=? a. {} b. {10} c. {100} d. {10, 20} e. none of the above 3. If we know that that A={j, b, c, a, e}; B={b, k, e, j}; C={v, k, a, e} then A B C=? a. {} b. {e, j} c. {a, e} d. {k, e} e. none of the above 4. If we know that that A={j, b, c, a, e}; B={b, k, e, j}; C={v, k, a, e} then A (B C)=? a. {e} b. {e, j} c. {a, e} d. {k, e} e. none of the above 5. If we know that that A={j, b, c, a, e}; B={b, k, e, j}; C={v, k, a, e} then (A B) C=? a. {e}

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111.Homework2 - Homework#2 ITI 111 Sets Precision and...

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