Math Questions

[silveryhair]

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[iralex801]

I need help on how to do all those also lol. However, I do know how to one of those you listed though.

For this question:

A person is offered a job with a first year salary of 30,000. Each succeeding year, she receives a 10% cost of living increase. In addition she is offered up to a $2000 credit, Which of the following will be the maximum amount in dollars she earns during the third year?

In the first year she has a salary of 30000.

In the second year she receives 10 percent increase on 30000. So 10 percent of 30000 is 3000. She also receives 2000 credit. So in the second year, her total salary is 35000.

In the 3rd year, she receives another 10 percent, but this time its 10 percent of 35000, which is 3500. She also receives another 2000 credit. So the total is 40500, which is the answer.

 

[Streetwolf]

Quick couple before bed:

A container holds 9 red and 4 white balls. Two are drawn in sequence w/o replacement from the container. What is the probablity that exactly noe of these balls is red?

Ans 16/33

If one of the balls is red that means one of two possibilities: either you drew it first or you drew it second.

Drew first: 9/13 * 4/12 (or 1/3) = 3/13
Drew second: 4/13 * 9/12 (or 3/4) = 3/13
Together = 6/13

Not sure where you are getting 16/33 from.

Two sides of an isosceles triagle have kength 10 with the third side shorter than those two. If the area is 48, what is the longest possible third side?

Ans 16

Okay so the question says the third side is shorter than those two and yet the answer is 16?

I just want to say that many of these questions sound well beyond the scope of what you'd see on the DAT and I hope this isn't some homework sheet or something. In any case, the DAT is multiple choice. On a problem like this I would look for the largest answer below 10 and start plugging it in. If that particular side length didn't result in an area of 48 I would move on. Until the question makes sense I am not gonna tackle it.

 

[silveryhair]

Thanks Streetwolf! I knew I could count on you!

These questions are actually from the ADA 2009 sample test that you can purchase.

 

[mk4]

Quick couple before bed:

A container holds 9 red and 4 white balls. Two are drawn in sequence w/o replacement from the container. What is the probablity that exactly noe of these balls is red?

Ans 16/33

If one of the balls is red that means one of two possibilities: either you drew it first or you drew it second.

Drew first: 9/13 * 4/12 (or 1/3) = 3/13
Drew second: 4/13 * 9/12 (or 3/4) = 3/13
Together = 6/13

Not sure where you are getting 16/33 from.

Are they asking for one red or no red balls?