Electronics city is having a 75% off sale on all Acme Brand X televisions they h

Question

Electronics city is having a 75% off sale on all Acme Brand X televisions they have in stock. It is known that four of the 100 televisions in stock are defective.
A) If you select one television at random find the probability it is defective?
for this I got 4/100 or .04
B)Selected two at random find the probability
i) both are defective?
for this I got (4/100)*(3/99)=1/825 or.001212
ii) the probability both are not defective?
for this I got (96/100)*(95/99)=152/165 or .921212
iii) the probability that one is defective and the other is not defective (think about this one carefully)? I dont know how to do this one.
Could you check my answers and show me how to do the one I didn't do

I

Explanation / Answer

u have done correctly,the probability in last case is = 1- probability when both are defective or both are not defective= 1 -.111212 -0.921212==.077576 or = select 1 defective* select one that is not defective/ select any two = 4*96/ (100* 99)/2 =.07757

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