Worksheet on mean, median, mode

1.Calculate the mean from the following Where x is the size of the item and y is the frequency

2. You are to set up a hotel. There are a number of items under consideration. If we can give a numerical value to each they can be written as : Food and beverage- 50; Housekeeping=25: location=38; cost of construction=80; staff training=75 and others=50. Rank them from 1to 5 according to your priorities. These are the weights that you attach to each of the topics. Calculate the weighted mean from the data