Q 2: Al Bayan building construction supplier is worried about the fluctuating sales of cement in the last 03 months. They requested Mr. Ali a professional market researcher, to find out the average sales of cement in the last 03 months.

('00 Sales RO) 00-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 No. of days 109 13 18 10 14 8 18 10 a. Elaborate what do you understand by measures of central tendencies? (at least two measures) b. Find out average sales in the last 03 months. c. Discuss at least two characteristics of mean