Jack rolls a number cube twice. What is the probability that the sum of the 2 rolls is less than 8, given that the first roll is a 4? @amistre64

Question

Jack rolls a number cube twice. What is the probability that the sum of the 2 rolls is less than 8, given that the first roll is a 4?  @amistre64

amistre64 · Answer

how many rolls are 4+k <8?
how many rolls have a 4 in them?

anonymous · Answer

3?

amistre64 · Answer

k < 4 ..  so 3 and 2 are the only viable options .... 2 possible outcomes for that one

how many rolls start with a 4?

anonymous · Answer

1?

amistre64 · Answer

... i forgot theres a 1 side lol .... 3 possible outcomes that add to <8

and no,  the possible outcomes entotal are:

4,1
4,2
4,3
4,4
4,5
4,6

i count 6 total outcomes possible, 3 of which sum to <8

anonymous · Answer

the probability is 3?

anonymous · Answer

wait no 3/6 is the probability which =.5 right ?

amistre64 · Answer

no

the definition of ... yeah thats it :)

anonymous · Answer

lol thanks so much you're awesome!

amistre64 · Answer

youre welcome