4 kids are by Bruno labares equally

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50.