How many calls should the shop expect per hour

Reference no: EM131417881

Repairs

The probability model below describes the number of repair calls that an appliance repair shop may receive during an hour.

Repair Calls	0	1	2	3
Probability	0.1	0.3	0.4	0.2

a) How many calls should the shop expect per hour?

b) What is the standard deviation?

Reference no: EM131417881

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