Can be any of these. Average is a vague non-mathematical term to describeand for this one i know its the 'mean' so they couldn be mode and median am i correct ?
The receptionist reported to management that the ‘average’ number of telephone enquiries per hour for the day was 7.5.
(b) Explain whether the value 7.5 could be
(i) the mode of the day’s data.
(ii) the median of the day’s data.
(iii) the mean of the day’s data.
the central tendency of a data set. Typically this can be any of the mode,
median or arithmetic mean.
Though arithmetic mean is more common than the mode or median.