exam
Maths Puzzle
Numerical Ability
In how many different ways can two black cards be drawn from a standard deck of cards? Assume that the order of the cards matters.
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exam Other Question
A load of 12km stretches a spring to 30cm. A load of 15km stretches it to 40cm. What is the function? What is the unstretched length? What load stretches it to 80cm?
I need help with the following
Given U = {18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29}, A = {21, 23, 25, 27, 29}, and B = {26, 27, 28, 29}. Find A′ U B′.