George studied 3/4 hour on monday and 7/8 hour on tuesday. how long did he study altogether on both days?
a 1 5/8 hr
b 1 3/4 hr
c 1 3/8 hr
d 2 1/2 hr

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?