The average of 7 data is 34 and the average of first three data is 28 and the average of next two data is 47. Find the average of last two data.

30

Sum of 7 data = 238

Sum of last 3 data = 84

Sum of next 2 data = 94

Sum of last two data = (238) - (84 + 94)

                               = 60

Avg of last two data  = \(\frac{60}{2}\) = 30