Question

A science teacher has supply of 50% methane solution and a supply of 80% methane solution.How much of each solution should the teacher mix together to get 105 mL of 60% methane solution for an experiment.
a. 70 mL of the 50% solution and 35 mL of the 80% solution

b. 35 mL of the 50% solution and 70 mL of the 80% solution

c. 62 mL of the 50% solution and 43 mL of the 80% solution

d. 43 mL of the 50% solution and 62 mL of the 80% solution

IS IT C????

Answer 1

huh?? is it a??

Answer 2

It's A

Answer 3

What is it