In the science club, there are 8 sixth graders for every 9 seventh graders. At this year's science fair, there were 23 projects by the sixth graders for every 27 projects by the seventh graders. Is the ratio of sixth graders to seventh graders in the science club equivalent to the ratio of science fair projects by the sixth graders to projects by the seventh graders? *

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.