SOLUTION: I had this question on my Math test and it was worth 12 marks. I will put the answers I gave. A blue die and a green die are rolled simultaneously. Draw a sample space diagram a

Algebra ->  Probability-and-statistics -> SOLUTION: I had this question on my Math test and it was worth 12 marks. I will put the answers I gave. A blue die and a green die are rolled simultaneously. Draw a sample space diagram a      Log On


   

Question 1090798: I had this question on my Math test and it was worth 12 marks. I will put the answers I gave.
A blue die and a green die are rolled simultaneously. Draw a sample space diagram and use it to find;
a) a 3 on the green die =1/6
b) double six =1/36
c) any double =1/6
d) an even result with the blue die =1/2
e) a sum of 9 =1/9
f)a sum more than 10 = 1/12
g) a sum of 2,3 or 4 =1/6
h) a sum other than 12 =35/36
I)a difference of 3 =1/6
My answers were all marked incorrect and my teacher said I should not have put them as a fraction- eg question a) should be just 6. This test was worth 40% of my grade for the term and this question was the only one I got wrong. I would really appreciate if someone could tell me why? Thankyou.
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
The lesson you learned from this is: 

ALWAYS READ THE INSTRUCTIONS VERY, VERY, VERY CAREFULLY!

and answer exactly accordingly.  
If the instructions
do not say "probabilities", then don't give probabilities.

Did you draw the sample space diagram, like it said to?

(1,1) (1,2) (1,3) (1,4) (1,5) (1,6)

(2,1) (2,2) (2,3) (2,4) (2,5) (2,6)

(3,1) (3,2) (3,3) (3,4) (3,5) (3,6) 

(4,1) (4,2) (4,3) (4,4) (4,5) (4,6) 

(5,1) (5,2) (5,3) (5,4) (5,5) (5,6)

(6,1) (6,2) (6,3) (6,4) (6,5) (6,6)

Edwin