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Sagot :
Answer:
Let's approach this step-by-step:
1. Understand the given information:
• Jannelle has taken 4 tests
• Her current average is 87
• She wants her new average to be 90
• The new test is out of 100
2. Calculate the total points from the first 4 tests:
87 (average) × 4 (tests) = 348 points
3. Calculate the desired total after 5 tests:
90 (desired average) × 5 (total tests) = 450 points
4. Find the difference to determine the needed score on the 5th test:
450 (desired total) - 348 (current total) = 102 points
Therefore, Jannelle needs to score at least 102 on her fifth test to achieve an average of 90.
However, since the test is out of 100, it's not possible for Jannelle to raise her average to exactly 90 with just one more test.
The highest average she can achieve is:
(348 + 100) ÷ 5 = 89.6
So, the lowest (and only) score she can get on this test to maximize her average is 100/100.
Answer:
Step-by-step explanation:
Assuming all 5 of the tests are weighted equally
(4 * 87 + x )/5 = 90 solve for 'x' ...multiply both sides by 5
348 + x = 450 subtract 348 from both sides
x = 102 She will need to get an impossible score of 102 out of 100
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