Question

Two fair die are rolled. What is the probability of one of the dice showing 5 or the sum being at least 8?

Answer 1

well I know the sum of 8's probability is 5/36

Answer 2

right so wouldn't it be 1/6?

Answer 3

+ the probability of at least 8

Answer 4

so would it be 6/36?

Answer 5

you mean 2/36?

Answer 6

so the answer would be 7/36?

Answer 7

sorry can you forget about what I just said?

Answer 8

yeah

Answer 9

why?

Answer 10

for at least one to be a 5 would be 11/36

Answer 11

(for each dice)( 1/6 + 1/6) - 1/36 (because there's a double) = 11/36

Answer 12

so the answer is 11/36?

Answer 13

+ at least 8

Answer 14

so 11/36+16/36

Answer 15

- the mutual part

Answer 16

-1?

Answer 17

13/18?

Answer 18

-6/36

Answer 19

21/36

Answer 20

why -6/36

Answer 21

because (5,1)(5,2)(5,3)(3,5)(2,5)(1,5) are included in both probabilities.

Answer 22

oh let me check

Answer 23

I hope that's right.

Answer 24

would it be 7/12? simplified

Answer 25

yes

Answer 26

I did it backwards the sum of being at least 8 would be 17/36

Answer 27

my bad i didn't see the at least 8

Answer 28

ooh so otherwise would it be right?

Answer 29

I think but it would be 22/36= 11/18

Answer 30

ok ok :)

Answer 31

it says not correct

Answer 32

:(

Answer 33

isn't at least 8 = 15/36?

Answer 34

how?

Answer 35

8=5/36, 9=6/36, 10= 3/36, 11=2/36, 12=1/36

Answer 36

9 has 4 combinations

Answer 37

your right

Answer 38

26/36

Answer 39

15/36 + 11/36 - 6/36 = 20/36

Answer 40

5/9?

Answer 41

wait wait...

Answer 42

ok

Answer 43

yes I think 5/9.

Answer 44

I don't get this it says its wrong

Answer 45

:o is this an online thing?

Answer 46

yeah

Answer 47

ok try 26/36 then

Answer 48

i only have 2 more attempts

Answer 49

:( I don't get it the events are not mutually excessive so it should be 20/36
but if the test writer is dumb it might be 26/36...

Answer 50

I'm sorry I'm dumb too probably.