The average monthly income of a person in a certain family of 5 is Rs. 1000. What will be monthly average income of person in the same family if the income of one person increased by Rs.1200 per year?
Rs.1200
Rs.1600
Rs.2000
Rs.3000
Explanation:
According to the problem ,
sum of the incomes of the 5 members in the family = Rs y
given ,
Average salary of the family = Rs 1000
⇒ y / 5 = 1000
y = 5000 ----- ( 2 )
if one member annual income increase Rupees 12000 then
increase his monthly average income = Rs 1000
now ,
sum of 5 members income now = y + 1000
= 5000 + 1000 = Rs 6000 [ from ( 2 ) ]
New average income = 6000/ 5 = 1200 [ from ( 1 ) ]
Required average salary of the family = Rs 1200
According to the problem ,
sum of the incomes of the 5 members in the family = Rs y
given ,
Average salary of the family = Rs 1000
⇒ y / 5 = 1000
y = 5000 ----- ( 2 )
if one member annual income increase Rupees 12000 then
increase his monthly average income = Rs 1000
now ,
sum of 5 members income now = y + 1000
= 5000 + 1000 = Rs 6000 [ from ( 2 ) ]
New average income = 6000/ 5 = 1200 [ from ( 1 ) ]
Required average salary of the family = Rs 1200