Question

A student has scores of 68, 66.25, and 71.25 on his first three tests. He needs an average of at least 70 to earn a grade of C. What is the minimum score that the student needs on the fourth test to ensure a C?

Answer 1

Answer:

multiple 68 by 3 and multiple 70 by 3.now add the the difference 70 in order get the anwer

Step-by-step explanation:

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Answer 2

Given that:

• A student has scores of 68, 66.25, and 71.25 on his first three tests.
• He needs an average of at least 70 to earn a grade of C.

To Find:

• What is the minimum score that the student needs on the fourth test to ensure a C?

Let us assume:

• The student needs score of x on the fourth test to ensure a C.

According to the question.

70 × (No. of tests) = 68 + 66.25 + 71.25 + x

↠ 70 × 4 = 205.50 + x

↠ 280 = 205.50 + x

↠ 280 - 205.50 = x

↠ 74.50 = x

Hence,

• The student needs score of 74.50 on the fourth test to ensure a C.