The incomplete table below summarizes the number of left-handed students and right-handed students by gender for the eighth-grad
e 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
A) 0.410
B) 0.357
C) 0.333
D) 0.250
1 answer:
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The equation is 36 - 4x = 6.
Solution:
To write the equation without fraction.
The denominators must be same to add/subtract the fractions.
LCM of 1, 9 and 3 = 9.
Multiply first term by and
by
to make the denominator same.
Multiply by 9 on both sides.
Both 9 in the numerator and denominator get canceled.
36 - 4x = 6
This term does not have fraction.
Hence the equation is 36 - 4x = 6.