Midrange is an arithmetic mean of the extremes in both end of the data set. It only needs the smallest
value and the largest value to be given. The arithmetic mean of the maximum and minimum value of the set gives the midrange. For the set 6,7,3,4,3,5,6 the minimum value is 3 and the maximum value is 7 therefore the midrange would be equal to (7+3)/2 = 5. The answer is A.