A student has gotten the following grades on his tests: 87, 95, 86, and 88. He needs to have an average of 90 to receive an A for the class. What is the minimum grade he must get on the last test in order to have an average of 90?

(Measures of Central Tendency and Dispersion)

Question

David Davis

Mathematics

25 November, 02:48

A student has gotten the following grades on his tests: 87, 95, 86, and 88. He needs to have an average of 90 to receive an A for the class. What is the minimum grade he must get on the last test in order to have an average of 90?

(Measures of Central Tendency and Dispersion)

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Answers (1)

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Zimmerman · Answer 1

The student needs an average of 90 and he has the following grades:

87,95,86,88

in order to get a 90 average he has to get

90x5=450

87+95+86+88+?=450, 356+?=450, 450-356=94

the answer is 94

A student has gotten the following grades on his tests: 87, 95, 86, and 88. He needs to have an average of 90 to receive an A for the class. What is the minimum grade he must get on the last test in order to have an average of 90?(Measures of Central Tendency and Dispersion)

A student has gotten the following grades on his tests: 87, 95, 86, and 88. He needs to have an average of 90 to receive an A for the class. What is the minimum grade he must get on the last test in order to have an average of 90?

(Measures of Central Tendency and Dispersion)