Question

Joanie rolls two 1-6 number cubes 80 times. is it likely she will roll a sum of 5 more than 12 times?

F yes,because the probability of rolling a sum of 5 is 1/6 and 1/6×80=13 1/3 which is more than 12.


G. yes, because the probability of rolling a sum of 5 is 1/4 and 1/4×80=20 which is more than 12.


H. no, because the probability of rolling a sum of 5 is 1/10 and 1/10×80=8 which is less than 12.


J. no, because the probability of rolling a sum of 5 is 1/9 and 1/9×80=8 8/9 which is less than 12.

Answer 1

the answer is j. no, because the probability of rolling a sum of 5 is is 1/9 and 1/9*80=8 8/9 which is less than 12.

Answer 2

answer : no, because the probability of rolling a sum of 5 is 1/9 and 1/9×80=8 8/9 which is less than 12.

Joanie rolls two 1-6 number cubes 80 times.

The cube is rolled twice. total outcomes = 36

The  number of outcomes of getting sum 5 is

(1,4) (2,3) (3,2) and (4,1) so 4 outcomes

Probability of getting sum 5 = $\frac{Number \ of \ outcomes \ of \ getting \ sum \ 5}{total \ number \ of \ outcomes}$

= $\frac{4}{36} = \frac{1}{9}$

two cubes are rolled 80 times

So $\frac{1}{9} * 80 = 8.89$

8.89 is less than 12

So , answer is j