As reported by the Federal Bureau of Investigation in Crime in the United States, the age distribution of murder victims between 20 and 59 years old is as shown in the following table.
Age (yr) ___________________ Frequency
20-24 ................................ 2329
25-29 ................................ 1892
30-34 ................................ 1414
35-39 ................................ 1046
40-44 ................................ 900
45-49 ................................ 854
50-54 ................................ 673
55-59 ................................ 500
A murder case in which the person murdered was between 20 and 59 years old is selected at random. Find the probability that the murder victim was
a. Between 40 and 44 years old, inclusive.
b. At least 25 years old, that is, 25 years old or older.
c. Between 45 and 59 years old, inclusive.
d. Under 30 or over 54.