She will have to score at the very least a 92 on one of the tests to have the possibility of 90%
The lowest she can score on one of the tests will be 192.
The sum of the data set's values divided by the total number of values constitutes the data set's average value.
Given data;
The final test average is,90
Average of the four initial tests = 87
Let the lowest she can score on one of the tests will be x;
The average value of four tests add to the 5th and 6th test scores divided by the total no of tests taken till the second case gives the test average to be 90.
[tex]\rm \frac{87+4+x}{6} = 90 \\\\ x = 192[/tex]
Hence the lowest she can score on one of the tests will be 192.
To learn more about the average value refer;
https://brainly.com/question/13391650
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