(apex) eight people were asked if they have a brother or sister. this venn diagram shows the results. a person is randomly chosen from those shown in the venn diagram let event a = the person has a sister let event b = the person has a brother what does p(b/a) = 0.25 mean in terms of the venn diagram

The expression P(B/A) = 0.25 mean in terms of the Venn Diagram :

     Option: D

D. of the 4 people who has a sister , 1 of them has a brother.          

event A = the person has a sister

and event B = the person has a brother

This means that: A∩B denote the event that the person has a sister and brother.

Also we are given that: P(B|A)=0.25

We know that:

Also,

This means that out of the 4 person who has a sister 1 has a brother.

for this case we have that by definition, the surface area of a cylinder is given by:

where:

r: it is the radius of the cylinder

h: it is the height of the cylinder

we can also rewrite it as:

where:

la: it's the lateral area

ba: area of the base

option a