Maths p4 0580: Urgent questions!! :(

[Warrior66]

AOA! Can you please answer this question for me:
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_42.pdf
QUESTION No. 3d. Can you give a detailed explanation and also an easier and quicker way to questions regarding probability: "Tree Diagrams"?? Is there a way in which you don't have to draw the whole diagram example: A person has a pack of cards, he picks a card without replacing....*Note this is an easy example....there are some very confusing questions like what's the probability that the cards are the same or different....if u get what I mean??

Another question is that in histograms...they always ask u like how many students does 1 centimeter square represent???How do we do such questions???

Please reply as soon as possible.....Jazakallah!!

 

[Hamzeh S]

AOA! Can you please answer this question for me:
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_42.pdf
QUESTION No. 3d. Can you give a detailed explanation and also an easier and quicker way to questions regarding probability: "Tree Diagrams"?? Is there a way in which you don't have to draw the whole diagram example: A person has a pack of cards, he picks a card without replacing....*Note this is an easy example....there are some very confusing questions like what's the probability that the cards are the same or different....if u get what I mean??

Another question is that in histograms...they always ask u like how many students does 1 centimeter square represent???How do we do such questions???

Please reply as soon as possible.....Jazakallah!!

I didnt get what u dont understand in part 3d but for the centmeter square Just Measure with a ruler how much is the height and width and divide them by each other to get the Area Then divide the frequency over area u just calculated

 

[Warrior66]

height and width and divide them by each other to get the Area

* You mean multiply, right?
For question 3 part d I don't know how to get the answer...I mean what do you do to find the answer??

 

[Hamzeh S]

* You mean multiply, right?
For question 3 part d I don't know how to get the answer...I mean what do you do to find the answer??

Ya sorry

 

[Hamzeh S]

Well you need to find the probability that you dont get a 2 and keep multiplying it by itself and then multiply it by the probability that you get a 2 so
its like the mutiply the times it doesnt get a 2 and the last multiplication is to multiply the whole answer with the chance to get a 2 you gotta keep trying
so the probability of not getting a 2 is 4/6 keep multiplying 4/6 X 4/6 X 4/6 X 4/6 And then the chance that you get a 2 if it equals to the number given then its 5 times since u multiplied 4/6 4 times and then 2/6