Question: 1. In a certain assembly plant, three machines B 1, B 2 and B 3, make 50%, 25% and 25%, respectively, of the products.It is

1. In a certain assembly plant, three machinesB1,B2 andB3, make 50%, 25% and 25%, respectively, of the products.It is known from past experience that 3%, 3%, and 7% of the products made byB1,B2 andB3, respectively, are defective.If a finished product is found to be defective, what is the probability that it was produced byB1?

Please choose one:

a.0375

b.0450

c.0225

D.0625

2. According to a survey, 70% of households said that they have never purchased organic fruits or vegetables.Suppose that this result is true for the current population of households.A random sample of 8 households selected.Find the probability thatat least 7households in a random sample of 8 will say that they have never purchased organic fruits or vegetables.

Please choose one:

a.0.2985

b.0.0532

c.0.2553

D.0.1977

3. The mean number of customers entering a store is9 per 30 minuteson a given day.Find the probability thatin any 10 minutes, there are at least 2 customers entering a store.

Please choose one:

a.0.7852

b.0.8008

c.0.9888

D.0.1992

4. An average of 0.8 accident occurper dayin a particular large city.Find the probability that no accident will occur in this cityon a given day.

Please choose one:

a.0.7854

b.0.5232

c.0.2365

D.0.4493

Clear my choice

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