Question

: Your experience indicates that offering a discount in your emails increases responses by 80%. Your last email, without a discount, got 23,000 responses. If you mail to the same size list and offer a discount, how many responses would you expect? a) 41,400 b) 44,000 c) 48,300 d) 52,400

Answer 1

For this case we can make the following rule of three:
23000 -------> 100%
x --------------> 180%
Clearing the value of x we have:
x = (180/100) * (23000)
x = 41400
Answer:
you would expect about:
a) 41,400 responses