The probabilities of a boy passing English and Mathematic...
The probabilities of a boy passing English and Mathematics test are x and y respectively. Find the probability of the boy failing both tests
1-(x-y)+xy
1-(x+y)-xy
1-(x+y)+xy
1 - (x - y) + x
Correct answer is C
Prob (passing English) = x
Prob (passing Maths) = Y
Prob (failing English) = 1 - x
Prob (failing Maths) = 1 - y
Prob (failing both test) = Prob(failing English) and Prob(failing Maths) = (1 - x)(1 - y)
=1 - y - x + xy
=1 - (y + x) + xy
In △XYZ, determine the cosine of angle Z....
Find the midpoint of the line joining P(-3, 5) and Q(5, -3). ...
The diagram is a circle centre O. Find the value of x ...
Which of the following is a factor of 2 - x - x2?...
Find the tangent to the acute angle between the lines 2x + y = 3 and 3x - 2y = 5. ...