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A shopping mail employed a clerk to attend to customer. 18 customers arrive on an...

A shopping mail employed a clerk to attend to customer. 18 customers arrive on an average of every 10 minutes while the clerk can attend to 20 customers in 10 minutes. Calculate the;
(A) average number of costumers in the system
(B) average number of costumers in the queue
(C) average time a customer spends in the system
(D) average time a customer waits before being attended to?

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
JAMB CBT 2024 - Candidates, Schools, Centres, Resellers - Get Ready!
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
JAMB CBT Mobile App 2024 - Free Download
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995