If A : B = 3 : 2, then (3A – 2B): (2A – B) is equal to

The students in three classes are in the ratio 2 : 3 : 5. If 20 students are increased in each class, the ratio changes to 4 : 5 : 7 . originally the total number of students was: 

If A's capital is equal to three times of B's capital and if B's capital is equal to four times of C's capital, then the ratio of their capitals is

If A : B = 1 : 2 , B : C = 3 : 4 , C : D = 6 : 9 and D : E = 12:16 then A : B : C : D : E is equals to -

A bag contains three types of coins 1 rupee-coins, 50p-coins and 25 p-coins totaling 175 coins. If the total value of the coins of each kind be the same the total amount in the beg is: 

If $$ {y\over x-z}={y+x\over z}={x\over y}$$ the find x:y:z is?

In a school there are total 414 students. The ratio of boys and girls is 5 : 4. If 46 more boys gets admitted into the school, then what will be the new ratio of boys and girls?

Find the mean proportional between 8 and 98.