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.
Answer & explanation
Correct answer: option 3
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