The least common multiple would give you the answer you are looking for. Multiples of 6: 6, 12, 18, 24, 30, ..... 9: 9, 18, 27, 36, ..... He will have a lesson on the same day in 18 days. Starting on Tuesday we need to go 18 days. 14 days would be another Tuesday, Wednesday = 15, Thursday = 16, Friday = 17, Saturday = 18
Your answer is B. This is because the mode is the number that is repeated the most amount of times. In this data set, $650 is repeated while the other numbers are only said once.
