) A brand of cars has a normal distribution for the lifetime of lasting time of cars. The average lifetime is 16 years with a standard deviation of 2 years. If you bought one such car today, what is the chance that your car will only last for up to 14 years? If your friend had a car of this brand for 14 years already, what is the chance that he (she) has to buy a new car in seven years? If a company bought 7 such cars, what is the probability that exactly two of them will last between 12 and 20 years? If the manufacturer want to offer a warrantee that is as attractive as possible and at the same time they don’t want to refund more than 0.5% of customers, how long the warranty should be?

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.1 years, and standard deviation of 3.2 years.If you randomly purchase one item, what is the probability it will last longer than 16 years?

A particular fruit's weights are normally distributed, with a mean of 429 grams and a standard deviation of 13 grams. If you pick one fruit at random, what is the probability that it will weigh between 411 grams and 467 grams > Next Question

For healthy individuals, between 18 and 48, the mean heart rate is 60 beats per minute (bpm) with a standard deviation of 10 bpm.  If an individual between 18 and 48 is selected at random, what is the probability that person's heart rate is between 50 and 70 bpm?