In Hawaii shark attacks are very rare. Furthermore, about 55% of all shark attacks are serious, but

Question:

In Hawaii shark attacks are very rare. Furthermore, about 55% of all shark attacks are serious, but not fatal (Reference: Sharks of Hawaii, Dr. Leighton Taylor, University of Hawaii Press). You are scheduled to give a talk at a local scuba club in Honolulu and want to include a brief statistical profile regarding the most recent 6 shark attacks, all of which were nonfatal. Let r be the number of nonfatal attacks out of a random sample of 6 shark attacks.

(a) Make a histogram for the probability distribution of r.

(b) What is the probability all six shark attacks are nonfatal?

(d) What is the expected number of nonfatal shark attacks out of the six? What is the standard deviation of the r-probability distribution?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...