The weekly wages of employees of Volta gold are normally distributed about a mean of$1250 with a standard deviation of $120. Find the probability of an employee having a weekly wage lying 1) between $1320 and $970 2) over $1290 3) under $1400

1) 0.7104 = 71%

2) 0.6615 = 66%

3) 0.8944 = 89%

Step-by-step explanation:

1)

Z(low)=-2.3330.009815329

Z(upper)=0.5830.720165536

2)

Z(low)=0.3330.63055866

Z(upper)=8322.9081

3)

Z(low)=-10.4170

Z(upper)=1.250.894350226

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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