205k views
5 votes
Let e be the event that a randomly generated bit string of length three contains an odd number of 1's, and let f be the event that the string starts with 1.

Are e and f independent?

User Omricoco
by
8.6k points

1 Answer

5 votes

Final answer:

No, events e and f are not independent.

Step-by-step explanation:

To determine whether events e and f are independent, we first need to find the probabilities of each event and the probability of their intersection.

e is the event that a randomly generated bit string of length three contains an odd number of 1's. The possible outcomes are 001, 010, 011, 100, 101, and 111. There are 4 outcomes that satisfy event e. So, P(e) = 4/8 = 1/2.

f is the event that the string starts with 1. The possible outcomes are 100, 101, and 111. There are 3 outcomes that satisfy event f. So, P(f) = 3/8

The intersection of events e and f is the outcome 111, which satisfies both events. So, P(e ∩ f) = 1/8.

If e and f were independent, then P(e ∩ f) should be equal to P(e)P(f). However, P(e)P(f) = (1/2)(3/8) = 3/16, which is not equal to 1/8. Therefore, events e and f are not independent.

User Okket
by
7.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories