What is the average number of times thumbtack lands

Assignment Help Basic Statistics

Reference no: EM131813149

Question: When dropped on a hard surface a thumbtack lands with its sharp point touching the surface with probability 2/3; it lands with its sharp point directed up into the air with probability 1/3. The tack is dropped and its landing position observed 15 times.

a. Find the probability that it lands with its point in the air at least 7 times.

b. If the experiment of dropping the tack 15 times is done repeatedly, what is the average number of times it lands with its point in the air?

Reference no: EM131813149

Questions Cloud

Wesfarmers shares be worth five years from now : If the required rate of return for this shares is expected to remain at 12%, how much would Wesfarmers shares be worth five years from now?

Viewpoint of acquired and acquiring firm shareholders : Discuss the advantages and disadvantages of stock-for-stock versus cash-for-stock transactions from the viewpoint of acquired and acquiring firm shareholders.

Actual proportion of all adults who recognize the brand name : A corporation has advertised heavily to try to insure that over half the adult population recognizes the brand name of its products.

Quotes in the spot currency market-direct or indirect : There are two types of quotes in the spot currency market, direct or indirect.

What is the average number of times thumbtack lands : If the experiment of dropping the tack 15 times is done repeatedly, what is the average number of times it lands with its point in the air?

Probability of detecting an error in a piece of written work : Show that two such proofreaders working independently have a 99.96% chance of detecting an error in a piece of written work.

Corporate taxes-marginal tax rates on taxable income : What are Dakota’s average and marginal tax rates on taxable income?

Find the minimum score the instructor can set : Find the minimum score the instructor can set so that the probability that a student will pass just by guessing is 20% or less.

Probability-at least one healthy dog develop kennel cough : In spite of the requirement that all dogs boarded in a kennel be inoculated, the chance that a healthy dog boarded in a clean.

User Account

All Pages