Henry bakes 84 bread rolls and fruit muffins. after giving away 18 rolls there are 5/6 as many rolls as muffins left. how many rolls did henry bake?

Idon't want to fail summer school.the probabilities of contamination in medicine capsules due to the presence of heavy metals and different types of microbes are given in the table.the probability of capsule b having microbial contamination is (the same as, greater than, less than) the probability of capsule d having it.