Question 1142245: About 35% of the class, which is 12 students, are left handed. Find the total number of students in the class
Answer by ikleyn(52814) (Show Source):
You can put this solution on YOUR website! .
From the condition, you have this equation
0.35x = 12,
where "x" is the class population.
From the equation,
x = = 34.29 (approximately).
Rounding the answer to the nearest integer, you get the ANSWER : total number of students in the class is 34.
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In my view, the problem formulation IS NOT PERFECT.
When I read it for the first time, I may get understanding that 12 is the total number of students in the class.
Only when I read the second phrase, I start understand that it is not so.
Therefore, from my point of view, the problem, as it is presented, does not pass the test for accuracy . . .
Math problem should be presented / formulated in a more accurate way . . .
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This problem is on proportions.
On proportions, see the lessons
- Proportions
- Using proportions to solve word problems
- Using proportions to solve word problems in Physics
- Using proportions to solve Chemistry problems
- Typical problems on proportions
- Using proportions to estimate the number of fish in a lake
- HOW TO algebreze and solve these problems using proportions
- OVERVIEW of lessons on proportions
in this site.
These lessons were written specially for you.
Read them and become an expert in this area.
Start from the very first lesson.
Consider these lessons as your textbook, handbook, tutorials and (free of charge) home teacher.
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