A bag contains several red and several blue balls. Two balls are taken out at random.
Work out how many possible outcomes can include a red ball. (A tree diagram may help)

Abby is collecting rainfall data. she finds that one value of the data set is a high-value outlier. which statement must be true? abby will use a different formula for calculating the standard deviation. the outlier will increase the standard deviation of the data set. the spread of the graph of the data will not change. abby will not use the mean when calculating the standard deviation.