The average mark of candidates in an aptitude test was 128.5 with a standard deviation of
8.2. Three scores extracted from the test are: 148. 102, 152. What is the average of the
extracted scores that are extreme values (outliers)?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.