Question

The average monthly expenditure of ravi was rs. 1100 during the first 3 months,rs. 2200 during the next 4 months and rs. 4620 during the subsequent five months of the year. if the total saving during the year was rs. 2100, find ravi's average monthly income. (1) 1858 (2) 3108.33 (3) 3100 (4) none of these

Answer 1

first 3 months total expenditure is = 1100*3=3300
next 4 months total expenditure is.
=2200*4=8800
next 5 months total expenditure is
=4620*5=23100
then total expenditure in the year is
=23100+8800+3300=34200
then total salary =34200+2100=36300
(ans)

Answer 2

Answer:

The average monthly income of Ravi is $Rs. 3108.33$. That is, option $(2)$.

Step-by-step explanation:

Given data,

Average monthly expenditure of Ravi,

• For first $3$ months (January - March)  $= Rs. 1100$.
• For next $4$ months (April - July) $= Rs. 2200$.
• For subsequent $5$ months (August - December) $= Rs. 4620$.

Thus, total expenditure of Ravi in a year,

                       $= (3$ × $1100) + (4$ × $2200) + (5$ × $4620)$

                       $= 3300 + 8800 + 23100$

                       $= 35200$.

• Also, total savings during that year $= Rs. 2100$.

Thus, the average monthly income $=$ $\frac{1}{12}$(Total expenditure during a year $+$ Total savings during that year)

                                                          $= \frac{1}{12}(35200 + 2100)$

                                                          $= \frac{37300}{12}$

                                                          $= 3108.33$.

Therefore, the average monthly income of Ravi, during that particular year is $Rs. 3108.33$.