What is 1 + 1 haha free point

If you roll two fair dice (one black die and one white die), in how many ways can you obtain a 4 on at least one die?

Assemble the proof by dragging tiles to the statements and reasons column

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected