Question

Left hand! right hand
Female___!________
Male_____!_______
Total-18 ! 122
The incomplete table above summarizes the number of left-handed students and right-handed students by gender for the eighth grade students at Keisel Middle School. There are 5 times as many right-handed female students as there are left-handed female students, and there are 9 times as many right-handed male students as there are left-handed male students. if there is a total of 18 left-handed students and 122 right-handed students in the school, which of the following is closest to the probability that a right-handed student selected at random is female? (Note: Assume that none of the eighth-grade students are both right-handed and left-handed.)

A) 0.410
B) 0.357
C) 0.333
D) 0.250

Answer 1

RF = 5LF
RM = 9LM
LF+LM = 18
RF+RM = 122

RF=50
LF=10
RM=72
LM=8

So, fill in the table, and you should quickly find the answer.

Note: Also assume that none of the students is both male and female.

Answer 2

jnkl