The table given below shows the number of salesman in five companies. Companies Salesman C1 35 C2 10 C3 30 C4 5 C5 15 What is the average number of salesman in C2, C4 and C5?

5 10 15 20

10

Average number of salesman in C2 , C4 & C5 = \(\frac{10 + 5 + 15 }{3}\) = \(\frac{30}{3}\) = 10