The population of Seoul was studied in an article by B. Lee and J. McDonald, "Determinants of Commuting Time and Distance for Seoul Residents: The Impact of Family Status on the Commuting of Women" (Urban Studies, Vol. 40, No. 7, pp. 1283-1302). The authors examined the different occupations for males and females in Seoul. The preceding table is a frequency distribution of occupation type for males taking part in a survey. (Note: M = manufacturing, N = nonmanufacturing.) If one of these males is selected at random, find the probability that his occupation is
Occupation Frequency
Administrative/M .......... 2,197
Administrative/N .......... 6,450
Technical/M ............ 2,166
Technical/N ............ 6,677
Clerk/M ............... 1,640
Clerk/N ............... 4,538
Production workers/M ........ 5,721
Production workers/N ......... 10,266
Service ............... 9,274
Agriculture ............. 159
a. Service.
b. Administrative.
c. Manufacturing.
d. Not manufacturing.