Question 1098348
Let A denote the 85% solution and B denote the 0% solution which we have.
Let C denote the 70% solution which we want.
Using the method of alligation.
70= 70 - 0
15= 85 - 70
E.g. There are 70 parts of A plus 15 parts of B
Then 70+15=85
0.82352941*1190=980
980 mL of 85% solution.

1190-980=210
210 mL of 0% solution.(pure water)
check
0 * 210 + 0.85 * 980 = 0.7*1190
0 + 833.0 = 833.0
833.0 = 833.0
ok