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Find the average of the series : 312, 162, 132, 142 and 122?

Find the average of the series : 312, 162, 132, 142 and 122?

A. 194
B. 174
C. 162
D. 186
Average = (312 + 162 + 132 + 142 + 122)/5 = 870/5 = 174