A conference began at noon with two parallel sessions. The session on portfolio management was attended by

Question:

A conference began at noon with two parallel sessions.
The session on management was attended by 40% of the delegates, while the session on chartism was attended by 50%. The evening session consisted of a talk titled "Is the Random Walk Dead?" This was attended by 80% of all delegates.
a. If attendance at the management session and attendance at the chartism session are mutually exclusive, what is the probability that a randomly chosen delegate attended at least one of these sessions?
b. If attendance at the management session and attendance at the evening session are statistically independent, what is the probability that a randomly chosen delegate attended at least one of these sessions?
c. Of those attending the chartism session, 75% also attended the evening session. What is the probability that a randomly chosen delegate attended at least one of these two sessions? Portfolio
A portfolio is a grouping of financial assets such as stocks, bonds, commodities, currencies and cash equivalents, as well as their fund counterparts, including mutual, exchange-traded and closed funds. A portfolio can also consist of non-publicly...