Sydney has index cards numbered 1 through 10 and determines that the probability of drawing a 4 is 3 out of 10. If she draws cards 100 times, how many times can she expect to draw a 4? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

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