Of the 41 plays attributed to a playwright,10 are comedies, 11 are tragedies, 20 are histories. If one play is selected at random, find the odds against selecting a history.
There are a total of 41 plays attributed to the playwright.
Out of these, 20 are histories.
Therefore, the odds against selecting a history can be calculated as follows:
Number of plays that are not histories : 41 - 20 = 21
Odds against selecting a history = Number of plays that are not histories : Number of histories
= 21 : 20
So, the odds against selecting a history are 21 : 20.