Answer:
Expected number of subscribers in the sample who read the advertisements=42
Step-by-step explanation:
Step 1
Determine the proportion of both men and women subscribers as shown;
Proportion of Men subscribers=number of men subscribers/total number of subscribers
where;
number of men subscribers=980,000
total number of subscribers=number of men+number of women
total number of subscribers=(980,000+640,000)=1,620,000
replacing;
proportion of men subscribers=980,000/1,620,000=98/162
Step 2
Proportion of women subscribers=1-(98/162)=64/162
Step 3
Expected proportion of men that read the advertisement=(50/100)×(98/162)=4,900/16,200=49/162
Expected proportion of women that read the advertisement=(30/100)×(64/162)=1,920/16,200=192/1620
Step 4
Total number of proportion=(49/162)+(192/1620)=341/810
Expected number from the sample=(341/810)×100=42
Expected number of subscribers in the sample who read the advertisements=42
