Question

Jamal scored 62, 75, 76, and 90 on four tests. What does he need to score on the
fifth test in order to have a mean of exactly 80?
A
80
100
0
93
97​

Answer 1

Answer:

Step-by-step explanation:

In order to find the next score that he needs to get, add all of the previous four scores: 62+75+76+90 = 303. Then multiply 80 and 5 = 400. Subtract 400 and 303 = 97

Answer 2

The value of score in the fifth test, to make the mean of Jamal score after the fifth test as exactly 80 should be 97.

What is mean of data set?

The mean of the data is the average value of the given data. The mean of the data is the ratio of the sum of all the values of data to the total number of values of data.

Jamal scored 62, 75, 76, and 90 on four tests. The sum of 4 test is,

$\sum =62+75+76+90\\\sum=303$

Now the required mean after the test number 5 is 80., Hence the total sum of the score should be,

$\sum =80\times5\\\sum=400$

Hence, to make the mean after the test number equal to 80, we need to subtract the total sum after 5 test to the total sum after the 4 test. Therefore, the score of fifth test is,

$S_5=400-303\\S_5=97$

Hence, the value of score in the fifth test, to make the mean of Jamal score after the fifth test as exactly 80 should be 97.

Learn more about the mean here;

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