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3 votes
Rod's quiz grades are 72, 74, 89, and90. What score on a fifth quiz will make his average woz grade at least 84?​

User Siemkowski
by
8.3k points

1 Answer

3 votes

Answer: He would need at least a 95

Explanation:

First I found the current average by adding 72, 74, 89, and 90 which equals 325.

Second, I worked backwards to see what the sum of his grades had to be by multiplying 84 times 5. 84 times 5 = 420

Now that we have both the current and the target sum, we find the difference by doing 420-325 which equals 95.

User Schroedingers Cat
by
8.1k points

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