Question

you roll a fair dice twice. find the probability at least one dice shows a 4 given that the minimum of the two numbers is a 3.

Answer 1

make a chart is what i do

Answer 2

1 2 3 4 5 6
1
2
3
4
5
6

mark all those that are 3x

1 2 3 4 5 6
1
2
3 x x x x
4 x
5 x
6 x

Answer 3

out of 7 ways; ony 2 have a four in them

Answer 4

2/7 if i see it right :)

Answer 5

oh ok. thank you so much! so the probability is 2/7

Answer 6

thats my guess, im a bit rusty at these so i cant say fer sure; but i think that it good

Answer 7

i was trying to calculate using formulas but then i got mixed up. this table seems very reasonable and easy

Answer 8

using the sample space and p(a) and stuff

Answer 9

yeah, i never remember the formulas that well

Answer 10

i was trying to learn it using the formulas since my prof might want to see calculations on the test

Answer 11

i figure the size of the given is:

3,3
3,4
3,5
3,6 = 7 ways to get a 3 as lowest
4,3
5,3
6,3

and 2 of those gots a 4

Answer 12

i do that too :)