Answer:
c. 90%
Explanation:
Options are "a. 52% of S. b. 67% of S. c. 90% of S. d. 60% of S. e. 48% of S"
Earlier , Cu = 20 , Co = 10
Service Level S = Cu/(Cu+Co)
Service Level S = 20 / (20 + 10)
Service Level S = 20/30
Service Level S = 0.667
After, Cu = 20*(1+20%)
Cu = 20 * 1.20
Cu = 24
Co = 10*(1+50%)
Co = 10*1.50
Co = 15
Updated Service Level = 24 / (24+15)
Updated Service Level = 24/39
Updated Service Level = 0.615
Proportion of S = 0.615/0.667
Proportion of S = 0.92
Proportion of S = 92%