The expected value of betting \( \$ 1 \) on one roulette number is approximately \( -\$ .05 \). What does this mean in practical terms? If many people made this bet over the course of the night, the house would expect to take in approximately a \( 5 \% \) return. If I bet \( \$ 1 \) one time, I would expect to leave the table with approximately 95 cents. I am almost guaranteed to lose this bet I am almost guaranteed to win this bet

QUESTÃo 4: André está realizando um teste de múltipla escolha, em que cada questão apresenta 5 alternativas, sendo uma e apenas uma correta. Se André sabe resolver a questão, ele marca a resposta certa. Se ele não sabe, ele marca aleatoriamente uma das alternativas. André sabe \( 60 \% \) das questões do teste. Então, a probabilidade de ele acertar uma questão qualquer do teste (ísto é, de uma questão escolhida ao acaso) é igual a: a) 0,62 b) 0,70 c) 0,68 d) 0,72 e) 0,58

QUESTÃO 6: No lançamento simultâneo de dois dados a \( \begin{array}{llll}\text { probabilidade de se obter soma menor que } 8 \text { é? } \\ \begin{array}{llll}\text { a) } 5 / 36 & \text { b) } 1 / 12 & \text { c) } 7 / 12 & \text { d) } 5 / 18 \\ \text { e) } 5 / 12\end{array}\end{array} \)

A bag contains 3 gold marbles, 9 silver marbles, and 21 black marbles. Someone offers to play this game: You randomly select one marble from the bag. If it is gold, you win \( \$ 4 \). If it is silver, you win \( \$ 2 \). If it is black, you lose \( \$ 1 \). What is your expected value if you play this game?

A box contains 3 red, 11 blue, and 9 green marbles. a) Two marbles are selected at random with replacement. Find the probability they are both red. b. Two marbles are selected at random without replacement. Find the probability that the first is blue and the second is green. c. Two marbles are selected at random without replacement. Find the probability that the first is blue and the second is yellow. Calculator

Ben buys a bag of cookies that contains 9 chocolate chip cookies, 5 peanut butter cookies, 5 sugar cookies and 4 oatmeal cookies. What is the probability that Ben randomly selects a peanut butter cookie from the bag, eats it, then randomly selects a chocolate chip cookie? Express you Inswer as a reduced fraction. Question Help: \( \square \) Video Submit Question