toss a coin once and then spin a 3-color spinner (yellow, red, blue) once. observe the upturned faces of the coin, and the color on the spinner

For coin there are two possible outcomes: head or tail.

For 3-color spinner you have three possible outcomes: red, blue and yellow.

Tossing a coin once and then spinning a 3-color spinner once you'll have 6 posiible outcomes:

head + red; head + blue; head + yellow; tail + red; tail + blue; tail + yellow.