Welcome to the article A bag contains one red pen four black pens and three blue pens Two pens are randomly chosen from the bag and are not replaced. On this page, you will learn the essential and logical steps to better understand the topic being discussed. We hope the information provided helps you gain valuable insights and is easy to follow. Let’s begin the discussion!
Answer :
Answer: C) 0.21
Step-by-step explanation:
8 total pens....4 are black
first pick, probability of being black is 4/8
2nd pick. without replacing, probability is 3/7
probability of a black pen picked first and then another black pen picked again is : 4/8 * 3/7 = 12/56 = 0.21
HOPE THIS HELPS :)
Thank you for reading the article A bag contains one red pen four black pens and three blue pens Two pens are randomly chosen from the bag and are not replaced. We hope the information provided is useful and helps you understand this topic better. Feel free to explore more helpful content on our website!
- What is the perimeter of the figure 32 0cm 51 0cm 19 0cm 63 0cm.
- The sign shows when a lift is safe to use the total mass of people should be 480 kg or less Fred and some other.
- The sign shows when a lift is safe to use the total mass of people should be 480 kg or less Fred and some other
Rewritten by : Brahmana
The required probability that a black pen is chosen first and then another black pen is chosen is 0.21. Option C is correct.
What is probability?
Probability can be defined as the ratio of favorable outcomes to the total number of events.
Here,
We can use the formula for calculating conditional probability to solve this problem:
P(black pen first and then another black pen) = P(black pen first) * P(black pen second given that a black pen was chosen first)
The probability of selecting a black pen first is 4/8 since there are 4 black pens out of a total of 8 pens in the bag.
Once a black pen has been selected, there are only 7 pens left in the bag, out of which 3 are black pens. Therefore, the probability of selecting another black pen given that a black pen was chosen first is 3/7.
Multiplying these probabilities together, we get:
P(black pen first and then another black pen) = (4/8) * (3/7) = 0.214
Rounding this to the nearest hundredth, we get 0.21.
Therefore, the answer is (C) 0.21 is incorrect.
Learn more about probability here:
brainly.com/question/14290572
#SPJ7