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a)If three students scored 70 on a test and three other students scored 89 on the same test, find the mean, median & mode for the test scores.
b) the mean scourge on a set of 21 tests is 74. What’s the sum of all the test scores?

Respuesta :

benmartin

Answer:

a. Mean = 84.25. Median = 89. Mode = 89. b. Sum = 1554.

Step-by-step explanation:

a. Mean: add together 70, 89, 89, and 89, to get 337. Divide by 4 to get the mean, which is 84.25.

Median: The "middle" number, which is 89.

Mode: The number that occurs most often, which is 89.

b. 21 times 74 equals 1554. This is the sum of the test scores.

Hope this helps!

joellewood7312009

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