Joanne C. answered 7d
Enthusiastic Math and Science Tutor with over 20+ years of experience
- There are 8 people fishing at Lake Connor:
- 3 have fishing licenses
- 5 do not.
- 2 Chosen at random
FIND: What is the probability that both people have licenses? Write your answer as a fraction in simplest form.
These events are dependent. Once you choose 1 person with a license, now there are less people to choose from and there is one less person with a license.
Dependent events A and B, P(A and B)=P(A)×P(B│A)
Dependent events = Probability of A times P(B│A)=probability of B given that A has already occurred
To start with you have 8 people, 3 with license.
Probability of an event = (number of favorable outcomes)/(total number of outcomes)
P(A)= (3/8) for the 1st person with a license
Now there are 7 people left and only 2 with a license.
P(B)= (2/7) for the probability of getting the 2nd person with license.
The total probability is the product of the two probabilities.
P(B|A)=(3/8) x (2/7)
Hope this helps.
Let me know if you need more clarification :)