1) The variance of a random variable whose PDF is f(x)=2(1-x) when 0 is less than x is and x is less than 1 and the PDF is 0 otherwise is equal to?

a) 0.0555

b) 0.0678

c) 0.0432

d) 0

2) Find the predicted outcome of defective TV sets when in a shipment of 7 TV sets containing 2 defectives a hotel makes a random purchase of 3 of the sets.

a) 1 to 2

b) 1 to 3

c) 0 to 1

d0 0 to 3