Average:
Average = Sum of observations / Number of observations
Average Speed :
Suppose a man covers a certain distance at x kmph and an equal distance at y kmph.
Then, the average speed druing the whole journey is [2xy/(x+y)] kmph.
Question 1
Q1. The average monthly expenditure of a family for the first four months is Rs 2570, for the next
three months Rs 2490 and for the last five months Rs 3030, if the family saves Rs 5320 during the whole year, the average monthly income of the family during the year is :
