If the value of z is to the left of the mean then its value

If the value of z is to the left of the mean, then its value is The following represents the probability for the daily demand of microcomputers at a local store. Refer to exhibit #3. The expected daily demand is 1.0 2.2 since it has the largest probability Of course 4, since it is the largest demand level 21 - Refer to exhibit ft3. The probability of having a demand for at least two microcomputers is

Solution

19) If z is to left of mean its value is negative.

(Reason: z=0 is the line of mean at the centre. Hence left will be negative)

20) Expected daily demand = sum of (demand* prob)

= 0+0,2+0.6+0.6+0.8

= 2.2

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21)P(Demand >=2) = P(2)+P(3)+P(4) =0.7

Hence option a