In a class of 30 students, on average, 6 will be left-handed. If a class includes 27 "lefties", estimate how many students are in the class.
30/6 = x/27
6x = 810
solve for x
To estimate the number of students in the class, we can use proportions.
Given that on average, 6 out of 30 students are left-handed, we can set up a proportion:
(left-handed students) / (total students) = (6) / (30)
We are given that there are 27 left-handed students, so we can substitute this value into the equation:
27 / (total students) = 6 / 30
Now, let's solve for the total number of students in the class:
Cross-multiplying gives us:
27 * 30 = 6 * (total students)
810 = 6 * (total students)
Dividing both sides by 6:
810 / 6 = total students
135 = total students
Therefore, the estimate for the number of students in the class is 135.
To estimate how many students are in the class, we can use the concept of proportions.
We know that, on average, 6 out of 30 students are left-handed. This can be expressed as a fraction or a ratio:
Left-handed students / Total students = 6 / 30
To find the estimated total number of students, we need to determine the proportion of left-handed students in the given class.
Let's set up a proportion:
27 (number of lefties in the class) / x (total number of students in the class) = 6 / 30
We can solve this proportion by cross-multiplying:
27 * 30 = 6 * x
810 = 6x
Now, we can solve for x by dividing both sides of the equation by 6:
810 / 6 = x
x = 135
Therefore, the estimated number of students in the class is 135.