When calculating probability, we are comparing the number of favorable outcomes to the number of possible outcomes. To calculate the probability that a randomly chosen number is not less than 10 we will use the Probability Formula.
P=Favorable Outcomes/Possible Outcomes
In the set, there is a total of 7 numbers. This is the number of possible outcomes.
Out of these, 10, 12, 19, and 35 are not less than 10. Therefore there are 4 favorable outcomes. Now we have enough information to calculate P(not less than10).
