Two numbers a and b are in the ratio 3:2 and their sum is 25. The value of a is?

The mean proportional between 0.08 and 0.18 is?

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 P: Q: R = 2:3:4, then find: $\frac{P}{Q}:\frac{Q}{R}:\frac{R}{P}$

What is the value of x if $4 : x = x : 16$ ________?

P is 40 years old and Q is 60 years old. How many years ago was the ratio of their ages 3 : 5 ?

What is the average of marks obtained by the all students in computer?