The lower limit of a class interval in 15 if the class mark of that interval is 20, find its upper limit.*1 point2535535/2

Question

The lower limit of a class interval is 15 if the class mark of that interval is 20, find its upper limit.

1 point

2535
535/2

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Solution

The class mark of an interval is the midpoint of the lower and upper limits. It is calculated by adding the lower limit and upper limit and dividing by 2.

Given that the class mark is 20 and the lower limit is 15, we can set up the following equation to find the upper limit (U):

(15 + U) / 2 = 20

To solve for U, we first multiply both sides by 2:

15 + U = 40

Then, we subtract 15 from both sides:

U = 40 - 15

So, the upper limit of the class interval is 25.

This problem has been solved

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