7 of the 50 digital video recorders​ (DVRs) in an inventory are known to be defective. What is the probability that a randomly selected item is​ defective?

3

5

Explanation:

Remember that odds for plus odds against must be 1. Therefore, 20 out of 50 of the DVRs are defective, so 30 out of 50 would work.

30

50

simplifies into

3

5

, so that would be the probability of you picking out a DVR that works, and the probability of picking one that does not work would be the leftover

2

5

. Or, if you're answering with a percent, you would have a 60% chance of picking a working DVR.

I hope this helps, I know the explanation isn't really clear, but I can't really think of another way to explain it.Step-by-step explanation:

97gycyrz32

Answer A

-3 times 4=-12  12 limbs lost in 4 days  Step-by-step explanation:  A zombie lost 3 limbs each day for 4 days  We need to frame the equation  A zombie lost 3 limbs. It means 3 is negative because it says lost  3 limbs lost for 4 days  So we need to add -3 , four times  -3+(-3)+(-3)+(-3)= -12  We can also write equation as  -3 \ times \ 4=-12  -12 represents the number of limbs lost in 4 days  12 limbs lost in 4 days