Jane is 14 years older than mary. in five years jane will be one less than twice mary's age. what is the sum of jane and mary's age in years?

Three coins are flipped. what is the probability that there will be at least two tails?

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?

D. in a discrete probability distribution, the sum of the probabilities for the discrete variables will be > 1. true or false