Answer:
0.352
or 6/17
Step-by-step explanation:
There are 17 marbles in all. There are 6 blue ones, so that means there's a probability of getting 6 out of 17, which is 6/17. To get the decimal I just divided 17 into 6 and rounded.
If there are 12 students sharing plants and each student need 1/3 of a can, they only need 4 cans for all 12 students!!