5/9 + 1/3 = 5/9 + 3/9 = 8/9 <==
He has 87 cards then he gets 9 more which is 96, he then gives 16 away which is 80, then he is given 3 which is 83 he sells all 83 cards to the collector & the collector gives him $124.50 each card is worth $1.50
The answer is C, because to find IQR you have to find the difference (subtract) of the first and third quartile
