Question

Suppose you choose a number on a piece of paper at random from a bag. The numbers include this set: {7, 9, 10, 11, 12, 13, 14, 15}. There is only one paper for each number, so there are no repeats of the same number. What is the probability that you choose a number less than 10?

Answer 1

1/4

Explanation:

Given the random set of numbers chosen from the bag as {7, 9, 10, 11, 12, 13, 14, 15}

Total outcome = 8 numbers

The numbers that are less than 10 will be the expected outcome, the sets are {7,9}

Expected outcome = 2 elements

Probability = Expected outcome/Total outcome

Pr(that you choose a number less than 10) = 2/8

Pr(that you choose a number less than 10) = 1/4