# Question

A recent survey found that, despite airline requests, about 40% of passengers don’t fully turn off their cell phones during takeoff and landing (although they may put them in “airplane mode”). The two passengers across the aisle (in seats A and B) clearly do not know each other.

a) What is the probability that the passenger in seat A does not turn off his phone?

b) What is the probability that he does turn off his phone?

c) What is the probability that both of them turn off their phones?

d) What is the probability that at least one of them turns off his or her phone?

a) What is the probability that the passenger in seat A does not turn off his phone?

b) What is the probability that he does turn off his phone?

c) What is the probability that both of them turn off their phones?

d) What is the probability that at least one of them turns off his or her phone?

## Answer to relevant Questions

A company that manufactures and sells consumer video cameras sells two versions of their popular hard disk camera, a basic camera for $750, and a deluxe version for $1250. About 75% of customers select the basic camera. Of ...Exercises 36 and 38 discussed the challenges faced by the Red Cross in finding enough blood of various types. But blood typing also depends on the Rh factor, which can be negative or positive. Here is a table of the ...Professional polling organizations face the challenge of selecting a representative sample of U.S. adults by telephone. This has been complicated by people who only use cell phones and by others whose landline phones are ...Given independent random variables, X and Y, with means and standard deviations as shown, find the mean and standard deviation of each of the variables in parts a to d. a) X – 20 b) 0.5T c) X + Y d) X-Y A small software company will bid on a major contract. It anticipates a profit of $50,000 if it gets it, but thinks there is only a 30% chance of that happening. a) What’s the expected profit? b) Find the standard ...Post your question

0