A bag contains 2 red and 4 green sweets of the same size ...
A bag contains 2 red and 4 green sweets of the same size and shape. Two boys pick a sweet each from the box, one after the other, without replacement. What is the probability that at least a sweet with green wrapper is picked?
15
25
815
1415
Correct answer is D
P(at least one green wrapper) = 1 - P(no green wrapper)
= 1−(26×15)
= 1−115
= 1415
Evaluate \frac{1}{1 - \sin 60°}, leaving your answer in surd form....
Find the value of the constant k for which a = 4 i - k j and b = 3 i + 8 j are perpendi...
What percentage increase in the radius of a sphere will cause its volume to increase by 45%? ...
Find the fourth term of the binomial expansion of (x - k)^{5} in descending powers of x....
Given that F^1(x) = x^3√x, find f(x)...
Find the coordinates of the centre of the circle 3x^2 + 3y^2 - 6x + 9y - 5 = 0...
Calculate the distance between points (-2, -5) and (-1, 3) ...