The number of scores between 19.5 and 49.5 using the cumulative frequency is <u>16</u>.
<h3>What is the cumulative frequency?</h3>
The cumulative frequency is the running total of frequencies over some class intervals.
The frequency refers to the number of elements in the set or class.
Therefore, the cumulative frequency is the sum of all previous frequencies up to the required point.
<h3>Data and Calculations:</h3>
Scores on a Test
Class Frequency Cumulative Frequency
20–29 9 9 (0 + 9)
30–39 4 13 (9 + 4)
40–49 3 16 (13 + 3)
50–59 2 18 (16 + 2)
60–69 10 28 (18 + 10)
Thus, the number of scores between 19.5 and 49.5 using the cumulative frequency is <u>16</u>.
Learn more about cumulative frequencies at brainly.com/question/21807065
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Answer:negative case : 2.5x - 6.8 = -12.9
positive case : 2.5 - 6.8 = 12.9
step 2 : 6.8
step 3 : dividing by 2.5
step 4 : x = 7.88
Step-by-step explanation:
Answer:
84 students like math only
Step-by-step explanation:
The subtraction represents the length of one leg, so the answer is A
