Lizzie came up with a divisibility test for a certain number $m \neq 1$:
1 answer:
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Answer:
Jenny James would need to have a score of 97 out of 100 points in order to have an average of 90.
Step-by-step explanation:
Given that:
Scores of four tests
78, 89, 90 and 96
Let,
x be the score on fifth test.
Average is the sum of quantities divided by total number of quantities.
Average = 90
Average =
Putting the values in the formula;
Hence,
Jenny James would need to have a score of 97 out of 100 points in order to have an average of 90.