Suppose That the Weights of Vans Delivering Goods to Inner $\mu = 1510 \mathrm {~kg} ; \sigma = 620 \mathrm {~kg}$

question 26

Multiple Choice

Suppose that the weights of vans delivering goods to inner city shops are normally Distributed.If 70% of the vans weigh more than 1200 kg, and 80% weigh more than 1000 kg, What are the mean and standard deviation for the weights of vans serving the inner city
(round to tens) ?

• A) \(\mu = 1510 \mathrm {~kg} ; \sigma = 620 \mathrm {~kg}\)
• B) \(\mu = 1530 \mathrm {~kg} ; \sigma = 630 \mathrm {~kg}\)..
• C) \(\mu = 1550 \mathrm {~kg} ; \sigma = 640 \mathrm {~kg}\)
• D) \(\mu = 1530 \mathrm {~kg} ; \sigma = 630 \mathrm {~kg}\).
• E) There is not enough information given to determine the mean and standard deviation.

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