Answer:
A. Randomly select 45 customers from a list of all customers
Explanation:
We are given that,
The company wants to estimate the percentage of the customers who are left-handed.
In order to find the probability of an event,
We find the ratio of number of favorable events from a random sample to the total number of events.
So, we have to find the number of customers who are left-handed from a random sample and find the percentage.
Thus, the best method to select the sample would be,
A. Randomly select 45 customers from a list of all customers