Answer:
Given:
50 plays
31/50 are comedies or tragedies
19/50 are histories.
If one is selected at random,
the chances decrease dramatically,
so :
19/50 * 19/50 = 361/2500 = .1444
Less than .2 percent.
I may be wrong... Please do not assume I am correct; please check my steps too. Thanks, and good luck.