The probability of choosing a blue marble is 7/8, or 49/56, which means that out of 56 marbles, 49 are blue. 56-49=7, so there are 7 red marbles. Hope this helps! :)
Since there are 18 dogs.
And fraction denominator is 1/3
It will be divided by 6
And since ges walking 1/3 of the dogs he is originally walks with which is 18
That means the answer is 6.