Someone plz. what does p(b|a) = 0.25 mean in terms of the venn diagram. a.) of people who have a sister, 1 of them also have a brotherb.) of the 8 people surveyed, 2 of these have a brother. c.) of the 4 people who don't have a sister, 1 of them has a brother. d.) of the 4 people who don't have a sister, 1 of them has a brother.

a and c i think

the blue circle is all the people who had brothers one name was in the blue circle so one person had a brother but the in between part of the too circles are who had both a brother and a sister so the is one name in the between purple  so you count that one to for brother and for sisters

there were  2 people that had brother

 and four people that had sisters

and one that had both

c

Step-by-step explanation:

addition

step-by-step explanation:

it would take 7/10 of an hour too fill the pool.

step-by-step explanation: