The natural remedy echinacea is reputed to boost the immune system, which will reduce the number of

Question:

The natural remedy echinacea is reputed to boost the immune system, which will reduce the number of flu and colds. A 6-month study was undertaken to determine whether the remedy works. From this study, the following probability distribution of the number of respiratory infections per year (X) for echinacea users was produced.

Find the following probabilities.
a. An echinacea user has more than one infection per year.
b. An echinacea user has no infections per year.
c. An echinacea user has between one and three (inclusive) infections peryear.

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...