9 + 4 = 13
She is 13 floors away
Answer:
of the 4 people that have a sister, 2 of them have a brother
Step-by-step explanation:
probability of B given A
given that the person has a sister, what is the probability they have a brother
P (B/A) = 1/2
with this venn diagram
of the 4 people that have a sister, 2 of them have a brother
Answer:
q = 4
Fully simplifying this equation gives you answer (A) q = 4
Hope this helps!
