#16
1092...if 4 out of 7 named blue then
1092 * 4/7 = 624 (named blue)
1092...if 1 out of 3 named red then
1092 * 1/3 = 364 (named red)
364 + 624 = 988 (both named red and blue)
1092 - 988 = 104( neither named red nor blue)
answer is 104 people
#17
49 * 15 / 21 = 35
answer is 35
