The answer is A because you turn the fraction in a decimal then divide by 5
Event 4 (impossible), Event 3 (probability is 7/20), Event 1 (probability is 6/12 which is greater than 7/20), and Event 2 (certain to happen)
The Measures of Centrality are:
Mode, Median and Mean
From your list of answers therefore, it is the "mode".
