Ratio And Proportion Questions

Study the following table, (which shows the number of units of an item manufactured and sold by $5$ companies) and answer the question.CompanyNo. of units Manufactured (in thousands)Sold (in thousands)A4230B4532C3626D5136E5440The ratio of the number of units manufactured by companies C and E together and the number of units sold by A and D together is?

Two alloys A and B contain copper and zinc in the ratio $7:2$ and $5:3$ respectively. How many $\text{kg}$ of A and B must be melted in order to get an alloy of $44\text{kg}$ containing copper and zinc in the ratio $3:1$?

If $30\%$ of $(B-A)=18\%$ of $(A+B)$, then the ratio $A:B$ will be

If $\frac{a}{3}=\frac{b}{2}=\frac{c}{1}$, then $\frac{a+b+2c}{b}$ is

For three non-zero real numbers a,b,c, if
2
a
​
=
3
b
​
=
4
c
​
=
k
2a−3b+5c
​
, then the value of k is

For three non-zero real numbers a, b, c if $\frac{a}{2}=\frac{b}{3}=\frac{c}{4}=\frac{2a-3b+5c}{k}$ then the value of k is