Answer: 40
Step-by-step explanation:
It is given in the picture, that the sample size n=25, when we multiply 10 to it , it will be equals to the total number of grandparents.
Also, from the picture it can be seen that the population population would expect to prefer online shopping with merchant A =4
Now, the number of grandparents would expect to prefer online shopping with merchant A= [tex]10\times4=40[/tex]
