Answer:
a. 45ways b.3.95years
Explanation:
The composer Beethoven wrote 9 symphonies, 5 piano concertos, and 32 piano sonatas
(a) There are 9*5 ways to play first a Beethoven symphony and then a Beethoven piano concerto
9*5=45
(b) The manager of a radio station decides that on each successive evening (7 days per week), a Beethoven piano sonata will be played followed by a Beethoven symphony followed by a Beethoven piano concerto.
there are 32*9*5 combinatios of piano sonata followed by a Beethoven symphony followed by a Beethoven piano concerto.
32*9*5=1440
1440 nights / 365 days= 3.95 years