- #1
Medicol
- 223
- 54
I have a group of dogs (3 brown male, 2 brown female, 4 white male, 4 white female, 5 black male, 4 black female)
What is the probability to
1. select a female brown dog ?
2. select a female, given that is a brown dog ?
3. select a brown given that is a female dog ?
Thank you.
I have tried
1. P(BrB)=freq of female brown/total dog number=1/11
2. P(F , Br)=P(female brown)/P(brown)=1/11 / 5/22 = 2/5
3. P(Br, F) = P(female brown)/P(female)=1/11 / 10/22 = 1/5
But my answers are different from those in my book
What is the probability to
1. select a female brown dog ?
2. select a female, given that is a brown dog ?
3. select a brown given that is a female dog ?
Thank you.
I have tried
1. P(BrB)=freq of female brown/total dog number=1/11
2. P(F , Br)=P(female brown)/P(brown)=1/11 / 5/22 = 2/5
3. P(Br, F) = P(female brown)/P(female)=1/11 / 10/22 = 1/5
But my answers are different from those in my book