Answer:
2.5 mL
Explanation:
What we must do first is calculate the total amount.
We know that there are 5 beakers with 15 mL, therefore in total it is:
15 * 5 = 75 mL
Now we want to divide that by 6. So divide by 6.
75/6 = 12.5 mL
For the 6 beakers to have the same amount, they must have 12.5 mL each.
Now, I divide this value by the number of beakers that have 15 mL. that is 5.
12.5 / 5 = 2.5 mL
This means that from each beaker the 6th beaker must receive 2.5 mL, to have a total of 12.5 mL and thus all have the same amount.