What is the common ratio of the sequence below?
2 1 1 1
3'6'24'96

Based on what i know about mean, this doesn't add up.

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

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.