A baseball statistician finds that his team uses a left-handed pitcher 90% of the time against an opponent. Of the times that the team uses a left-handed pitcher, 20% result in that team winning the game. On the other hand, 70% of the time that teams use a right-handed pitcher results in winning the game. According to the data that informed these probabilities, what percent of all the games won against this opponent were games in which a left-handed pitcher was used?

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

The height of a plant, in inches, p years after planting it is given by the polynomial function r(p) = -2p% + 270p. find the height of the plant when p = 90 years.

The data set represents the ages of players in a chess club. 27, 34, 38, 16, 22, 45, 54, 60. what is the mean absolute deviation of the data set?