there are 11 blue marbles and seven red marbles in a box write the ratio of marbles to blue marbles
It would help if you proofread your questions before you posted them. I assume you mean "red marbles to blue marbles".
7:11 or 7/11
on the other hand,
marbles : blue-marbles = 18:11
To find the ratio of marbles to blue marbles, we need to determine the total number of marbles in the box and the number of blue marbles specifically.
In this case, we are given that there are 11 blue marbles and seven red marbles in the box. Therefore, the total number of marbles in the box is 11 + 7 = 18.
To express the ratio of marbles to blue marbles, we divide the total number of marbles by the number of blue marbles. So, the ratio is 18 : 11.