What is the marginal probability of a respondent's most commonly used type of phone not being a landline? The table shows data about what type of phones that adults use. The respondents adults were...

Extracted text: What is the marginal probability of a respondent's most commonly used type of phone not being a landline? The table shows data about what type of phones that adults use. The respondents adults were divided into three groups depending on their age: 66 years and older, 41-65 years, and 18 40 years of old. | Smartphone Other Mobile Phone Landline Age 18-40 60 30 10 Age 41-65 40 40 20 Age 65 or older 20 30 50