# Question: A company has discovered that a recent batch of batteries

A company has discovered that a recent batch of batteries had manufacturing flaws, and has issued a recall. You have 10 batteries covered by the recall, and 3 are dead. You choose 2 batteries at random from your package of 10.

a) Has the assumption of independence been met? Explain.

b) Create a probability model for the number of good batteries chosen.

c) What’s the expected number of good batteries?

d) What’s the standard deviation?

a) Has the assumption of independence been met? Explain.

b) Create a probability model for the number of good batteries chosen.

c) What’s the expected number of good batteries?

d) What’s the standard deviation?

## Answer to relevant Questions

A grocery supplier believes that the mean number of broken eggs per dozen is 0.6, with a standard deviation of 0.5. You buy 3 dozen eggs without checking them. a) How many broken eggs do you expect to get? b) What’s the ...A bicycle shop plans to offer 2 specially priced children’s models at a sidewalk sale. The basic model will return a profit of $120 and the deluxe model $150. Past experience indicates that sales of the basic model will ...Can we use probability models based on Bernoulli trials to investigate the following situations? Explain. a) Each week a doctor rolls a single die to determine which of his six office staff members gets the preferred parking ...An Olympic archer is able to hit the bull’s-eye 80% of the time. Assume each shot is independent of the others. If she shoots 6 arrows, what’s the probability of each of the following results? a) Her first bull’s-eye ...An orthodontist has three financing packages, and each has a different service charge. He estimates that 30% of patients use the first plan, which has a $10 finance charge; 50% use the second plan, which has a $2 0 finance ...Post your question