Question
A bag contains 20 white and some black balls. If
the probability of drawing a black ball from the bag is 2.5 times that of drawing a white ball, find the number of black balls in the bag.Solution
x + y = 4, xy = 2, y + z = 5, yz = 3, z + x = 6 and xz =4, then find the value of x 3 + y 3 + z 3 – 3xyz.
...If 5x - 13xy + 6y = 0, find x : y.
In ∆ ABC, MN ‖ BC, the area of quadrilateral MBCN=130 sqcm. If AN : NC = 4 : 5, then the area of ∆ MAN is:
In a best-of-two chess match between Player X and Player Y, the probability that Player X wins a game is (5/9), and the probability that Player Y loses ...
- If x 4 – 83x 2 + 1 = 0, then the value of x 3 - x -3 can be:
If p3 + 9p2 + 8p + 13 = 6p2 + 5p + 12, then find the value of {(p4 + 1/p2)}/(p2 + 3p +...
If a – b – c = 0, then the value of (a2 + b2 + c2)/(b + ac) is:
If a = 7.250, b = 3.258 and c = 3.992 then value of a3-b3-c3-3abc is.
Find the value of
(1 - `1/(p+1)` ) + (1 - `2/(p+1)` ) + (1 - `3/(p+1)` ) + ........................... + (1 - `p/(p+1)` )
A number is increased by 20%, and the resulting number is decreased by 20%. If the initial number is ₹x, the final number is ₹2880. What is the valu...
