Search found 51 matches


I was checking some of the approaches here and possibly wasn't calculating the values correctly. I don't see how the sum of 141...145 = 10000. Also, I focused on answers 11 and 153 through POE because I figured that if option E was both answers 5 and 77 then its probably not either since both can't ...

by evansbd

Mon Jul 28, 2008 5:47 am
Forum: Problem Solving
Topic: Help needed
Replies: 6
Views: 1617
by evansbd

Wed Jul 23, 2008 9:33 am
Forum: Problem Solving
Topic: 3 digit numbers with 0 - 5
Replies: 4
Views: 1831

Venn Diagram

Can someone use paint to show the solution with 5 circles?

Here is one with 3, does this satisfy the question?

by evansbd

Wed Jul 23, 2008 9:02 am
Forum: Problem Solving
Topic: sets
Replies: 17
Views: 2382

I get it but I don't see it....

I see the solution that you need to find odd numbers that satisfy the criteria. However, on a real GMAT, I easily saw the 48 even numbers but I don't see (intuitively) how ppl are seeing that starting with 7 you can see other odds that will meet the criteria then you end up with 12. What are the 12 ...

by evansbd

Wed Jul 23, 2008 5:37 am
Forum: Problem Solving
Topic: Probability
Replies: 12
Views: 1952

Hold on ....

How are we getting 60 total numbers that satisfy this problem?

by evansbd

Tue Jul 22, 2008 12:46 pm
Forum: Problem Solving
Topic: Probability
Replies: 12
Views: 1952

Probability

In a basketball contest, players must make 10 free throws. Assuming a player has 90% chance of making each of his shots, how likely is it that he will make all of his first 10 shots? a) 10% b) 25% c) 35% d) 45% c) 55% How many randomly assembled people do u need to have a better than 50% prob. that ...

by evansbd

Tue Jul 22, 2008 10:59 am
Forum: Problem Solving
Topic: Probability
Replies: 1
Views: 5003

Jeez...

So this is NOT a combinations problem.....

Thanks for the help...

by evansbd

Tue Jul 22, 2008 8:26 am
Forum: Problem Solving
Topic: Combinations
Replies: 3
Views: 1480

Combinations

Help anyone?

How many different points in space given by (x, y, z) are there if coordinates x, y, z are integers such that

-13 < x < 13 , 5 < y < 26 , 3 </ z </ 11

(</ --- less than or equal to)

a) 3,500
b) 3,850
c) 4,500
d) 4,915
e) 5,300

by evansbd

Tue Jul 22, 2008 8:04 am
Forum: Problem Solving
Topic: Combinations
Replies: 3
Views: 1480

Confused...

The solution provided seems simple...but can someone explain the math? Are the exponents being multiplied or is there more factoring not shown in the solution. 2(2^5) + 3(3^5) I see that 2^5 = 32, so 2(2^5) = 64, which is 2^6. I would have picked the correct answer because the others do not have the...

by evansbd

Tue Jul 22, 2008 7:39 am
Forum: Problem Solving
Topic: my exam is tomrrow - please help with this stupid simple eqn
Replies: 6
Views: 1326

Comination...

Definitely...I never accounted for all 3 girls being chosen

by evansbd

Fri Jul 18, 2008 12:54 pm
Forum: Problem Solving
Topic: Sequences
Replies: 6
Views: 2824

Comination...

I think....

the answer to the second question is (4C2)/(10C3) = 1/6

by evansbd

Fri Jul 18, 2008 11:08 am
Forum: Problem Solving
Topic: Sequences
Replies: 6
Views: 2824

Sequences

I gathered a bunch of questions, then forgot where these originated from. I believe it was an old thread from this group but I can't find the threads. 1)In a sequence, each term is obtained by adding 4 to the preceding one. If the sum of the first 10 terms is equal to 80, what is the result of the a...

by evansbd

Fri Jul 18, 2008 10:26 am
Forum: Problem Solving
Topic: Sequences
Replies: 6
Views: 2824
by evansbd

Fri Jul 18, 2008 6:09 am
Forum: Problem Solving
Topic: Race Probablility
Replies: 9
Views: 1842