Calculus
A school survey records 120 students: 30 play football, 50 play basketball, 40 play neither. What is the marginal probability (as a decimal) that a randomly chosen student plays basketball?
In a study of 500 households, 75 households both own a dog and subscribe to a home delivery service. What is the joint probability a randomly chosen household both owns a dog and subscribes to a delivery service? Provide the simplified fraction and decimal.
Which explanation correctly contrasts joint and conditional probability?