Of the calls a directory assistance operator received, 188 were requests for telephone numbers listed in the c

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Of the calls a directory assistance operator received, 188 were requests for telephone numbers listed in the current directory. This accounted for 94% of the calls for assistance that the operator received.


(a) How many calls did the operator receive?


(b) How many telephone numbers requested were not listed in the current directory?

(a) If x is the total number of calls:
188/x = 0.94 ie x = 200

(b) 200-188=12