Question

3. A survey at a school asked students if they were ill with a cold or the flu during last months.
The results were as follows. None of the students had both a cold and the flu.
Cold Flu Healthy
Females 32 18 47
Males 25 19 38
Use these results to estimate the probability that:
a. a randomly selected student had a cold last month.

b. a randomly selected females students was healthy last month.
c. a randomly selected student who had the flu last month is male.
d. a randomly selected student had either a cold or the flu last month.