Probability of rolling a sum of 9 or a sum that is even from two number cubes is 11/18 Explanation: When a dice is rolled there are different ways in which 9. can be obtained, which are (3,6) or (4,5) or (5,4) or (6,3). 4 options. As in all there are 6⋅6=36 options, probability is 4/36 or 1/9.
For getting an even number as sum, we can have (1,1) or (1.3) or (1,5) or (2,2) or (2,4) or (2,6) or (3,1) or (3,3) or (3,5) or (4,2) or (4,4) or (4,6) or (5,1) or (5,3) or (5,5) or (6,2) or (6,4) or (6,6) 18 options, probability is 18/36 or 1/2.
Note that the two events (getting 9 or even sum) are mutually exclusive, the probabilities can be just added i.e. combined probability is 1/9+1/2=2+9/18i.e. 11/18
Kelli=X·$29.99+$25·1=54.99---> 1 jean and the blouse
Gina=X·$23+$37·1=$60----> 1 jean and the blouse
There is a problem with this problem. it doesnt say if gina bought more or if kelly bought more so saying that they bought the exact same pairs of jean it would be an inequation=
$29.99·X+$25<$23·X+$37---> One spent more than the other one
