Meera's average in 5 subjects is 72. Leaving out her highest mark lowers the average by 3; leaving out her lowest mark raises the average by 4. What is the range of her marks?
Competition practiceStatistics
A30
B24
C28
D7
Step-by-Step Solution
Total =360. Highest =360−4×69=84; lowest =360−4×76=56. Range =84−56=28. (7 just adds the 3 and 4.)
Answer: C) 28
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