the formula to find the probability is p(a ∩ b)=p(b | a)p(a) and p(a ∩ b) = .
total numbers in the hat = 30
let a be the event of picking number 1 and b be the event of picking number 2 then without replacement.
clearly, the probability of the second event depends on the first event.
so, p(a ∩ b)=p(b | a)p(a)
p(b | a) means probability of event b with the condition that event a has happened.
so, the first number picked is 1.
therefore, p(b | a) =
p(a ∩ b)=
80000/109600=.73 cents per share
47. 1 feet
brady is putting trim around the outside of the circular merry-go-round, so he needs to use the formula for circumference to find the amount of trim he needs to buy. the formula for the circumference of a circle is: c = dπ, where d = the measure of the diameter and π = 3.14. using the given measure of the diameter:
c = 15(3.14) = 47.1 feet