Step-by-step explanation:The Mean, Median and Mode are the three measures of central TENDENCY. Mean is the arithmetic average of a data set. This is FOUND by adding the numbers in a data set and dividing by the number of observations in the data set. The median is the middle number in a data set when the numbers are listed in either ascending or descending order. The mode is the value that occurs the most often in a data set and the range is the difference between the highest and LOWEST values in a data set. The Mean x¯¯¯=∑xN Here, ∑ represents the summation X represents observations N represents the number of observations . The Median If the total number of observations (n) is an ODD number, then the formula is given below: Median=(n+12)thobservation If the total number of the observations (n) is an even number, then the formula is given below: Median=(n2)thobservation+(n2+1)thobservation2 The Mode Themodeisthemostfrequentlyoccuringobservationorvalue. SOLVED Examples