You know if an answer is an over or underestimate because if the last 2 # is 5 and over, it is an overestimate. If the last 2 # is 4 and under, it is an underestimate. Ex: 345 answer if you were estimating 350 over
You multiply the numbers, that will lead you to the answers. So 4/5 * 3/4 will give you the fraction of the girls with long brown hair.
To get the answer for Part B, do 4/5 * 3/4 * 1/3.
Estimated amount of students in 7th grade is about 298
