Worksheet on mean, median, mode

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

100 50
24 32
56 65
70 87
92 65
35 65
45 68
50 70
32 42

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

item wt