Question

can anyone help me plse

Answer 1

basically add 105 and 45 because it shows you how much they got in total together and since the ratio is 5:11 the total is 16 so 150/16 is 9.375

Answer 2

@AkashdeepDeb

Answer 3

Set up equations for all the relationships you know. E.g., for the ratio of the incomes:\[\frac{ I _{J} }{ I _{M} }=\frac{ 5 }{11 }\]

Now do a similar one for the expenditure ratio.

You also know:\[ I _{J}- E _{J}=45\]
Now do a similar one for Mary.

You now have 4 equations in 4 unknowns, which is solvable with a bit of plug & chug. The individual income-expenditure equations can be easily solved for one of the variables, then plug it back into one of the ratio equations.

Answer 4

Let both their incomes be: 5x, 11x
Expenditures: 7y, 15y respectively!
So you'd have 2 equations
5x-7y=45
11x-15y=105
Solve them and get their expenditures!!
Getting me? :)

Answer 5

Ratio gives the ORIGINAL VALUE when multiplied with a COMMON FACTOR
For incomes common = x
for expenditures common = y
Understood? :D

Answer 6

^^^yeah that's slicker than mine. :) same idea but computationally easier.

Answer 7

:)

Answer 8

@AkashdeepDeb
thanks you

Answer 9

:)