# math

posted by Malena

I am so bad at word problems! Help me find out how to figure this one out.

1/5 of the boys are absent and 2/5 of the girls are absent in Drew’s class. Bert thinks that you multiply, so his answer is 2/5 of the class are out. Elmo thinks that means 3/5 of the class is out. Ernie thinks 3/10 of the class is out. Kermit didn’t find out how much of the class are out, but he thinks the answer is between 1/5 and 2/5. Analyze each person’s answer to find out who is right. Then determine who knows the most math.

1. Reiny

absent: b/5 + 2g/5
= (b+2g)/5

fraction absent = (b+2g)/(5b+5g)
...going nowhere

take an example,
suppose there are 25 boys and 30 girls or 55 total
boys missing = 5
girls missing = 12
total missing = 17
fraction missing = 17/55
which is none of 2/5, 3/5, or 3/10

now 1/5 = 11/55
and 2/5 = 22/55

mmmh?

2. Someone

Elmo is correct because 1/5+2/5=3/5.

## Similar Questions

1. ### Algebra

Hi! Today I was absent from my algebra class, and they learned how to recognize and factor the difference of two squares.. I've tried to figure it out from the book, but it's not making any sense... Can someone help?
2. ### Math

Im trying to help my daughter with some math homework and Im stuck can you help me please this is the problem Jeremy has been home sick with the flu for the last 7 days. While absent from school, he got 31 get well cards from friends. …
3. ### Math Help

Suppose that each student in stat. has a 9% chance of missing class on any given day and that student attendance is independent. In a stat. class of 20 students, find the probability that: 1) no student is absent 2) one student is …

Suppose that each student in stat. has a 9% chance of missing class on any given day and that student attendance is independent. In a stat. class of 20 students, find the probability that: 1) no student is absent =15.16 2) one student …
5. ### math

there are 13 boys and 14 girls in mrs greens class if 3 of the students are absent today what is the ratio of students absent to students present?
6. ### math

In Rosa's class,there are 15 boys and 12 girls. On Wednesday,all the girls were present and 1/5 of the boys were absent. How many students were in class today
7. ### Math -fractions word problems

Three sevenths of the students in class 4C are boys.There are 4 more girls than boys.How many boys are there in the class