Answer:
Part A: 3/5 of the girls have long brown hair.
Part B: 1/4 of the girls in the fifth-grade class have long brown hair with green eyes.
Explanation:
Part A: multiply, 4/5*3/4.
4/5*3/4=12/20=3/5
Part B: multiply 3/5*1/3. Since it is all three, get the answer from above and multiply it by 1/3.
3/5*1/3=3/15=1/5