There are 48 students in a college gathering. The ratio of the number of boys to the number of girls in the gathering is 5:3. If the ratio of the boys to girls has to be made 6:5, then how many girls need to be added to the gathering, without changing the numbers of boys who are attending the gathering?

If $(x+y) : (x-y) = 7 : 3$, then find the ratio of $(x^2+y^2) : (x^2-y^2)$.

If A exceeds B by 40%, B is less than C by 20%, then A : C is :

The ratio between two numbers is 3:7 and their LCM is 210. The first number is

Three persons A, B and C start a venture with capitals ₹ 1,20,000; ₹ 90,000; and ₹ 60,000 respectively. After 4 months A withdraws ₹ 20,000; after 8 months B adds ₹ 30,000. At the end of year the profit is ₹ 2,88,000. Find C's share.

Read the information given below carefully and answer the question that follows:

(A) The mean of 20 observations is 17. On checking, it was found that two observations were wrongly copied as 3 and 6. If the wrong observations are replaced by correct values 8 and 9, then the correct mean will be 16.4.

(B) The ratio of $4^{3.5} : 2^5$ is same as 4 : 1

(C) The ratio of 1.5 : 2.5 can also be written as 3 : 5

(D) If : 2A = 3B = 4C, then, A : B : C is equal to 6 : 4 : 3

Choose the correct option:

If A : B is 2 : 5. Then, the value of 2A + 3B : A + B is