In a group of 120 people,90 of them are 30 years old or older. everyone else in the group is younger than 20 years old. if a person is selected at random, what is the probability the person is less than 20 years old

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?