Posted by **mysterychicken** on Sunday, June 9, 2013 at 1:45pm.

Can someone check my answers and help me

1. A vector in standard position has its initial points at (0,0)

True?

2. The general formula for finding the probability of two events A and B that are not mutually exclusive and overlap is given by: P(A or B) = P(A) + P(B) + P(A and B)

True?

3. The formula for the arrangement of r of n objects is given by: n!/(n-r)!

False?

4. In buying a car, a customer has a choice of 3 bumper types, 4 stereo systems, 8 interior colors, 2 engines, 4 carpets, and 6 seat covers. How many different combinations of these 6 options are available?

Is it 4608?

5. The following statement is true by mathematical induction: n! > or equal to 2^n for all natural numbers n

False

Thank you!

- Math -
**Steve**, Sunday, June 9, 2013 at 5:35pm
1. ok

2. dependent or independent?

independent is P(A) + P(B) - P(A&B)

3. True - check your text

4. ok

5. ok

but it is true for n>3

- Math -
**mysterychicken**, Sunday, June 9, 2013 at 5:58pm
So if it is true for n>3, would the answer be true?

- Math -
**Steve**, Thursday, June 13, 2013 at 5:31am
NO! All natural numbers means n>0

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