Bruce wants to make 50 ml of an alcohol solution with 12% concentration. He has a 10% alcohol solution and a 15% alcohol solution. Which equation can bruce use to determine how much of the 10% alcohol solution he should use?
A) 0.10x+0.15(50-x)=50+0.12
B) 0.10x+0.15(50-x)=0.12(50)
C) 0.10x+0.15(50-x)=50+0.12+0.12(50)
D) (0.10x)(0.15)(50-x)=0.12(50)

197 students (rounded to the nearest whole number)

Step-by-step explanation:

first I divided 11 by 114 to find out how much girls there are to every one boy and my answer was 10.36 (rounded to the nearest 2 d.p).

next I times it by eight according to the ratio given, my answer was 83 (rounded to the nearest whole number)

finally, I just added 114 and 83 together to get the total number of students and my answer to that was 197 (rounded to the nearest whole number)

hope it helped