# Question: Civil engineers believe that W the amount of weight in

Civil engineers believe that W, the amount of weight (in units of 1000 pounds) that a certain span of a bridge can withstand without structural damage resulting, is normally distributed with mean 400 and standard deviation 40. Suppose that the weight (again, in units of 1000 pounds) of a car is a random variable with mean 3 and standard deviation .3. Approximately how many cars would have to be on the bridge span for the probability of structural damage to exceed .1?

**View Solution:**## Answer to relevant Questions

We have 100 components that we will put in use in a sequential fashion. That is, component 1 is initially put in use, and upon failure, it is replaced by component 2, which is itself replaced upon failure by component 3, and ...From past experience, a professor knows that the test score of a student taking her final examination is a random variable with mean 75. (a) Give an upper bound for the probability that a student’s test score will exceed ...A person has 100 light bulbs whose lifetimes are independent exponentials with mean 5 hours. If the bulbs are used one at a time, with a failed bulb being replaced immediately by a new one, approximate the probability that ...This problem refers to Example 2f. (a) For any given molecule, what do you think is the (limiting) probability that it is in urn 1? (b) Do you think that the events that molecule j, j ≥ 1, is in urn 1 at a very large time ...Present a method for simulating a random variable having distribution functionPost your question