On a standardized test, each question has 4 possible responses, but only one correct answer. In order to account for possible guessing, you will only be deducted 1/3 of a point if you guess incorrectly. If you guess on one of these questions and the question is worth 1 point, what is your expected value? Number points

Delaney is about to take a final exam that consists of 20 questions. To motivate her to study, her parents promised her $500 if she gets at least 17 questions right. The questions are multiple choice and the probability of her getting a question right is 0.75 on each question of the final exam. What is the probability that she gets exactly 17 questions right? What is the probability that she gets at least 17 questions right?

A multiple-choice test contains 20 questions with 4 choices for each answer. If a student guesses on all the questions, find the probability that she will get at least 1 correct answer. Round your answer to 4 decimal places

If the probability that the Islanders will beat the Rangers in a game is 81%, what is the probability that the Islanders will win at least three out of five games in a series against the Rangers? Round your answer to the nearest thousandth.

You pay $20 to enter a raffle.  The first ticket drawn wins $1036, the second ticket drawn wins $477, the third through fifth win $186, and the sixth through tenth win $49.  Suppose 2345 tickets were sold.  What is the expected earning on your ticket?

Professor Ramos will participate in the lottery that will be played by 500 participants he buys a ticket for 5 dollars.the lucky randomly selected winner will get 100 dollars as a prize what would Ramos expected winnings or losses be. Show your calculations and interpret your  results

A magazine subscription service is having a contest in which the prize is 180000. If the company receives 3 million entries, which is the expection of the contest?

A survey of 1687 adults nationwide asked, "What irks you most about the actions of other motorists?" The response "tailgaters" was given by 483 people. What percent of those surveyed were most irked by tailgaters?