Probability calculation using frequency approach

2. Suppose 90% of kids who visit a doctor have a fever, and 20% of kids with a fever have sore throats. What's the probability that a kid who goes to the doctor has a fever and a sore throat? The probability is ______.
3. The percent distribution of live multiple-delivery births (three or more babies) in a particular year for women 15-54 years old is shown is the pie chart. Find each probability.
Pie Chart Reads
15-19- 1.3%
20-24- 6.9%
25-29- 22.0%
30-34- 38.3%
35-39- 24.9%
40-44- 5.1%
45-54- 1.6%

Randomly selecting a mother 30-39 years old
P(30-39)= _____ (Round to the nearest thousandth as needed)
4. The table below shows the number of male and female students enrolled in nursing at a university for a certain semester. A student is selected at random. Complete parts (a) through (d).
Nursing majors Non-Nursing Majors Total
Males 94 1016 1110
Females 600 1728 2328
Total 694 2744 3438
(a) Find the probability that the student is male or a nursing major
(b) Find the probability that the student is male or a non nursing major
(c) Find the probability that the student is female or a nursing major
(d) Find the probability that the student is female or a non nursing major.
(Round to the nearest thousandth as needed)
5. A password consists of four letters followed by a three digit number.
How many passwords are possible if there are n