Search found 26 matches
- by ithamarsorek
Mon Feb 07, 2011 3:48 pm- Forum: Problem Solving
- Topic: 2 Triangles
- Replies: 2
- Views: 1216
Probability
Karen has exactly 6 quarters, 5 dimes, and 10 nickels in her pocket. If she withdraws a number of these coins at random, how many coins would she have to withdraw to ensure that she has at least a 50 percent chance of withdrawing at least one quarter? 1 2 5 6 7 Thanks for your help :)
- by ithamarsorek
Wed Jan 26, 2011 4:40 pm- Forum: Problem Solving
- Topic: Probability
- Replies: 5
- Views: 2855
- by ithamarsorek
Sat Dec 25, 2010 2:53 pm- Forum: Problem Solving
- Topic: 7/27 step by step calculation method?
- Replies: 3
- Views: 899
7/27 step by step calculation method?
I've hit a complete blank on how to calculate this one and convert it into decimal points the easiest way.
Please help.
- by ithamarsorek
Sat Dec 25, 2010 2:38 pm- Forum: Problem Solving
- Topic: 7/27 step by step calculation method?
- Replies: 3
- Views: 899
- by ithamarsorek
Fri Dec 24, 2010 2:06 pm- Forum: Problem Solving
- Topic: A,A,B,B,B,C,D,E arrangement question
- Replies: 6
- Views: 4450
How do you know where it appears half of the time ?
Is it like a coin toss when we know that the chance for heads is 1/2 ans tails is 1/2 ?
- by ithamarsorek
Fri Dec 24, 2010 1:40 pm- Forum: Problem Solving
- Topic: A,A,B,B,B,C,D,E arrangement question
- Replies: 6
- Views: 4450
A,A,B,B,B,C,D,E arrangement question
Does anyone have a simpler explanation? I got most of it but trying to really understand expecially the part of dividing everything by 2 towards the end. Thanks much and happy holiday! In how many different ways can the letters A, A, B, B, B, C, D, E be arranged if the letter C must be to the right ...
- by ithamarsorek
Fri Dec 24, 2010 12:51 pm- Forum: Problem Solving
- Topic: A,A,B,B,B,C,D,E arrangement question
- Replies: 6
- Views: 4450
The more complex stuff I get, why did I get stuck on this?
Anyone... I need an simple explanation on how to solve this step by step.
For some reason it does not sink 
When tossing a fair coin 4 times what is the likelihood of having at least 3 heads?
- by ithamarsorek
Thu Dec 09, 2010 2:41 am- Forum: Problem Solving
- Topic: The more complex stuff I get, why did I get stuck on this?
- Replies: 1
- Views: 898
- by ithamarsorek
Wed Dec 08, 2010 12:04 am- Forum: Problem Solving
- Topic: Need help to understand these 2 questions
- Replies: 4
- Views: 1463
- by ithamarsorek
Tue Dec 07, 2010 4:47 pm- Forum: Problem Solving
- Topic: Need help to understand these 2 questions
- Replies: 4
- Views: 1463
Need help to understand these 2 questions
Q1: Can someone give me an easy explanation? please? The question is attached. 5 POSSIBLE (A-E) answers are: 2C+30 ______ 3 2C-30 ______ 2 C-10 ______ 3 2C-10 ______ 3 2C-30 ______ 3 Q2: Can someone give me an easy explanation? please? Scanning didnt go so well so here is the missing equation: C = 9...
- by ithamarsorek
Tue Dec 07, 2010 1:14 pm- Forum: Problem Solving
- Topic: Need help to understand these 2 questions
- Replies: 4
- Views: 1463