**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