Answer: 109 years old
Step-by-step explanation:
2009-1900=109
100-75=25% did not like
25%=35 students how about 75%
75 x 35 divided by 25=105 students
105
Answer by JKismyhusbandbae: The mean is the average of all the numbers. You add all the numbers and divide by how many numbers you added to get the mean.