Since ZY bisects GE and XY bisects EF, and both ZY and XY both bisect GF, then XY ~ ZE and ZY ~ XE. Therefore ZE = XY = 5 And GE = 2× ZE (because bisected segments are = and therefore ×2 = long segment). So GE = 2ZE = 2×5 = 10
In total, Kay took 5+14+2=21exams. she got 80%-90% on 14 of them. the probably is 14/21 which is 2/3. Therefore, the probability of Kay getting 80%-90% on her next exam is 2/3 or 66.6%
