Aiden bought some noteboks and book covers for the upcoming school year. he bought a total of 13 items. each notebook costs $1.37,and each book cover costs $1.08. he spent total of $16.36..how many notebooks and how many book covers did he buy?

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.