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MA 110 Test 1: Logic and Set Theory, Exercises of Mathematical Methods for Numerical Analysis and Optimization

The first test for ma 110, a college-level course in logic and set theory. The test covers various topics such as venn diagrams, truth tables, symbolic logic, and combinatorics. Students are required to answer questions related to these topics, some of which involve constructing diagrams, writing arguments in symbolic form, and computing cardinalities.

Typology: Exercises

2012/2013

Uploaded on 03/31/2013

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MA 110-91
§1.1 2.4 Test #1 score
Name:
21 February 2002
1. Use a properly labeled Venn diagram to determine the validity of the following argument.
Explain. (10 points)
1. All mechanics are men.
2. Sue is a mechanic.
Therefore Sue is a man.
2. Construct a truth table to show that the symbolic statement pqis logically equivalent
to its contrapositive. (10 points)
3. Write the following argument in symbolic form. Then use a truth table to determine if
the argument is valid. (10 points)
If the defendant goes to jail, then the defendant is not innocent. If the defen-
dant’s lawyer is good, then the defendant does not go to jail. Therefore, the
defendant is innocent or the lawyer is good.
pf3

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MA 110-

Test

score

Name:

21 February 2002

  1. Use a properly labeled Venn diagram to determine the validity of the following argument. Explain. (10 points) 1. All mechanics are men. 2. Sue is a mechanic.

Therefore Sue is a man.

  1. Construct a truth table to show that the symbolic statement pq is logically equivalent to its contrapositive. (10 points)
  2. Write the following argument in symbolic form. Then use a truth table to determine if the argument is valid. (10 points)

If the defendant goes to jail, then the defendant is not innocent. If the defen- dant’s lawyer is good, then the defendant does not go to jail. Therefore, the defendant is innocent or the lawyer is good.

MA 110 Test 1 page 2

  1. If U = { a, b, c, d, e, f , g, h, i, j, k, l, m, n }, A = { a, d, g, j, m } and B = { a, c, e, g, i, k, m }, enumerate the set (AB) ′. Then illustrate (AB) ′^ by shading the result in a Venn diagram. (10 points)
  2. List all of the subsets of the set { a, b }. Then list all the subsets of the set { a, b, c }. (10 points)
  3. In a group of 200 students, 75 play tennis, 126 play racquetball, and 61 play neither? How many of the students play both tennis and racquetball? Draw a properly labelled Venn diagram and explain your reasoning. (10 points)
  4. Compute the numbers 5 P 2 and 5 C 2. For the set { a, b, c, d, e }, list all the subsets of cardi- nality two and explain how this list is related to one of the numbers you just computed. (10 points)