the mean (average) can be found by adding up all the numbers and dividing that by how many numbers there are. The mean of this data set is : 405/15 = 27
the mode is the number that appears most often in ur data set so the mode is : 15
the range is the highest number - the lowest number the range is (45 - 15) = 30
the median is ur middle number the median is : 24
ascending order (smallest to largest) is : mode, median, mean, range
Since we already know that the older child is a girl (a 100% chance to be a girl), there must be a 50% chance that the other child is a girl. Therefore, the probability that both children are girls is 50%. Hope this helps!
