Question

you know that about 25% of customers will call back within 48 hours. of course customers who call back within 48 hours, about 20% of them will call back within 72 hours. of the 120 people you spoke with today how many do you expect to call two more times in the next 5 days

Answer 1

To solve this problem, we will start with $120$ people.

Since we know that about $25 \%$ of people will call back within $48$ hours.

So:

$25 \% \, \text{of} \, 120 \\ = \frac{25}{100} \times 120 \\ = 30$

Hence $30$ people out of $120$ people will call back within $48$ hours

Again:

Of those $30$ people, we know that about $20 \%$ of them will call back within $72$ hours.

So:

$20 \% \, \text{of} \, 30 \\ = \frac{20}{100} \times 30 \\ = 6$

Hence:

$6$ people will call two more times in the next $5$ days.