Question

Mr. Jacobs is going to make a histogram of the test scores from the last math test he gave. He plans to first organize the data into a stem-and-leaf plot and then make the histogram from the stem-and-leaf plot. The test scores are listed below.

79, 82, 65, 61, 94, 97, 84, 77, 89, 91, 90, 83, 99, 71, 68, 77, 87, 85

Which of the following expressions could be used to find how many students scored less than a 90 on the test?

3 + 4 + 6 + 1
4 + 6
3 + 4 + 6
3 + 4

Answer 1

Answer:

The correct expression to find how many students scored less than a 90 on the test is:

3 + 4 + 6 + 1

Step-by-step explanation:

This expression represents the number of test scores that are less than 90.

There are 3 test scores in the 60s (61, 65, and 68)
There are 4 test scores in the 70s (71, 77, 77, and 79)
There are 6 test scores in the 80s (82, 83, 84, 85, 87, and 89)
There is 1 test score in the 90s (only one score is less than 90, which is 89)
Adding these values together gives a total of 14 scores that are less than 90.