The table above shows the results of a survey of 100 customers of a particular company, each of whom gave a "Positive," "Negative" or "Neutral" rating of the company's product and its customer service. What was the number of customers who rated both the company's product and its service negatively?
- Forty customers did not give any "Negative" ratings at all, whether for product or service
- Thirty customers rated both product and service "Positive"