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Mary scored 200 marks in three tests. If average score of 60 is required then the lowest marks she must score for fourth test are
  • a)
    x gt; 40
  • b)
    x gt; 50
  • c)
    x gt; 60
  • d)
    x gt; 70
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Mary scored 200 marks in three tests. If average score of 60 is requir...
Given:
Mary scored 200 marks in three tests.
Average score of 60 is required.

To find:
The lowest marks she must score for the fourth test.

Solution:
Let the marks scored by Mary in the fourth test be x.

Total marks scored by Mary in four tests = 200 + x
Average score = (Total marks scored) / (Number of tests)
60 = (200 + x) / 4
240 = 200 + x
x = 40

Therefore, Mary must score at least 40 marks in the fourth test to maintain an average score of 60.

Answer: Option A, x > 40.
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Community Answer
Mary scored 200 marks in three tests. If average score of 60 is requir...
200/3 =66.67. × 60% =39.999
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Mary scored 200 marks in three tests. If average score of 60 is required then the lowest marks she must score for fourth test area)x gt; 40b)x gt; 50c)x gt; 60d)x gt; 70Correct answer is option 'A'. Can you explain this answer?
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