An athlete runs 7 miles in 45 minutes and then changes their pace to run the next 3 miles in 15 minutes. Overall, what is the average time in minutes it takes the athlete to run 1 mile?
9.5 minutes
9 minutes
6 minutes
10minutes
Correct Answer : C
to find the average time the athlete runs in 1 mile; we find total distance and total time the athlete takes in running.
Total distance run by athlete=7+3=10 miles
Total time=45+15 =60 minutes
The athlete runs 10 miles in 60 minutes. For the athlete to cover 1 mile, he will run for a time less than 60 minutes. Thus, in 1 mile, the athlete takes:
So, in 6 minutes, the athlete covers 1 mile.
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Correct Answer is D
Explanation
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Explanation
The median of a data set is found in two ways:
For an odd data set, the median fall in the (N+1)/2 th position.
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To find the median of the given data set, we need to arrange the elements from the smallest to the largest as follows:
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There are 11 elements in the data set. 11 is an odd number and the median fall in the (N+1)/2 th position.
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Explanation
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Explanation
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Explanation
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Correct Answer is C
Explanation
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Negative correlation: an increase in one variable causes another one to decrease
No correlation: a change in one variable does not cause any response in another variable.
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Explanation
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Explanation
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