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 fo r 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)
1 answer:
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
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