Mathematics Tes...

Out of 30 guests, twenty like tea and fifteen like coffee, also each guest likes at least one of the two drinks. How many guests like both tea and coffee?

The Value of X in two dimensional planes is also called as

Equation x(1+y²)dx+tan⁻¹ydy = 0 is satisfied by

A multiple choice question has 5 alternates, one or more than one correct. Find the least number of chances which would be given to a student such that probability of giving a correct answer is more than 1/3.

If$f\left(x\right)=\log \left(\frac{1+x}{1-x}\right)$and Ig(x) =$\left(\frac{3x+x^3}{1+3x^2}\right)$ then what is f [g(x)] equalto?

If A and B are two subsets of a set X such that n (X) = 900, n (A) = 400, n (B) = 600 and n (A∩B) = 250. Then, n (A'∩B') = ?

In a group of buffaloes and ducks, the total number of feet was more than twice the total number of heads, so find the number of buffaloes in the group.