Riyad can complete an assignment in 2 hours while omar can do the same assignment in 3 hours .they work together for an hour ,after which riyad left and omar had to finish the rest of the work alone. how much time in minutes will omar will require to finish the rest of the work?

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.