Greg has a bag of beads that contains 16 black, 20 red, and 4 white beads. he randomly picks a head places it back into the bag and then randomly picks another one. what is the probability that he picks a black and white bead?

4%

Step-by-step explanation:

There are 40 beads in total(16+20+4=40). There are 16 black so the probability of getting a black is 16/40=2/5. Since you put the bead back the bag will still have 40 beads when you pick another one. There are 4 white beads so probability of getting a white is 4/40=1/10. Then we multiply these two probabilities 2/5 * 1/10=1/25=4%.

Note: Order does not matter.

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6

1.30

step-by-step explanation: