Answer:
the number is 1
Step-by-step explanation:
4(7n-n)=24
28n-4n=24
24n=24
n=1
Let call it x
x/4=4/2
->x=8
Answer:
the answer to 30-60-90=0
Step-by-step explanation:
90-60=30-30=0
Answer:
6
Step-by-step explanation:
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
