A bag contains eleven balls labeled 1 through 11 . One ball will be randomly picked. What is the probability of picking a multiple of 3 ? Write your answer as a fraction.

Question A stack of cards contains six RED cards numbered \( 1,2,3,4,5,6 \), five BLUE cards numbered \( 1,2,3,4,5 \), and four GREEN cards numbered \( 1,2,3,4 \). If a single card is picked at random, what is the probability that the card has an ODD number? - Express your answer as a simplified Fraction Provide your answer below:

Question You roll a standard die (with the numbers \( \{1,2,3,4,5,6\} \) on its faces). Let \( A \) be the event that you roll an odd number. What is the probability of the event \( A \) ? Give your answer as a simplified fraction.

Question When a coin is tossed three times, what is the probability that all three tosses are heads? The possible outcomes for the coin tosses are \( \{H H H, T T T, H T T, H H T, T H H, T T H, H T H, T H T\} \) - Express your answer as a simplified fraction.

Question A professor gives a surprise quiz with one multiple choice question. There are 4 answer possibilities: B, C, and D. What is the probability that you randomly guess and select the correct answer? Give your answer as a fraction.

1 Para crear una prueba, un profesor tiene un banco de 50 preguntas. Si de ellas escogerá 20. ¿de cuántas formas puede crear la prueba? \( =50 \) \( =20 \)