congratulationsnukchebi0 wrote:
I still don't get what you are trying to do with the problems.
they, are all either solve, or simplifynukchebi0 wrote:
I still don't get what you are trying to do with the problems.
Was this supposed to be funny or an insult? If you read through the thread you would understand.Darkfire wrote:
congratulationsnukchebi0 wrote:
I still don't get what you are trying to do with the problems.
umm i did read through the thread and it seems that HE is the one asking for help, so if you dont understand, why would you even post? he didnt offer to explain the concept to people, he asked for help on itnukchebi0 wrote:
Was this supposed to be funny or an insult? If you read through the thread you would understand.Darkfire wrote:
congratulationsnukchebi0 wrote:
I still don't get what you are trying to do with the problems.
theit57 wrote:
Can someone please help me with these (peferably with work and not just the answer) couple problems becuase a couple of my friends and i don't get how to do them:
1. Elena has a 3-digit combination lock on her gym lock and has forgotten the combination. if she knows that the first digit is 3 and the second is prime, how many numbers must Elena try before the lock is sure to open?
answers are: 30, 12, 40, 120 40 been done before and proved I'll forget about this one
2. A bag contains 3 green marbles and 7 Is 'yellow marbles' meant to go here? 2 marbles are drawn at random. one marble is drawn and not replaced. then a second is drawn and not replaced. what is the probability that the first is yellow and the second is green.
answers are: 7/3, 7/90, 7/30, 1/7
7/10 * 3/9 = 21/90 = 7/30
Probability of drawing a yellow marble first is 7/10 because there are 7 yellow marbles and 3 green marbles making 10 total marbles. Probability of drawing a green next is 3/9. This is because you have already removed 1 yellow marble, so there are now 3 green left but only 6 yellow making the total 9. Now just multiply these together and you get your total probability
3. A drawer contains 5 red socks, 8 white socks, and 2 blue socks. without looking, you draw out a sock and draw a second sock w/o returning the first sock. what is the probability that the first sock and the second sock are both white?
answers are: 4/15, 2/21, 1/9, 64/225
8/15 * 7/14 = 4/15. Exactly the same reasoning as the previous question.
I honestly have no clue how to do these, so any help would be appreciated. thanks.
QFT! Seriously there is nothing easier in maths then probability it's all logic. Wait till you have to do calculus or even some of the hard stuff.Yaocelotl wrote:
C'mon man, this shit of probability and permutations is easy, pay attention in your class and stop playing PC games.
Try working out this (harder yet still simple) question. You throw 2 ordinary (6 sided) dice What is the probability of rolling an even number which is not a double?
Last edited by DrunkFace (2007-05-30 21:26:22)