On a 10 question multiple-choice test, where each question has 4 answers, what would be the probability of getting at least one question wrong? (write as a fraction)

On a 10 question multiple-choice test, where each question has 5 answers, what would be the probability of getting at least one question wrong? Give your answer as a fraction

You randomly select one card from a 52-card deck. Find the probability of selecting the five of hearts or eight of diamonds.

A multiple-choice test consists of 5 questions, each question with 4 possible responses(A, B, C, D). A student guesses on each question. Find the probability that the student will guess correctly on at least 1 question.

A student takes a multiple choice test that has 10 questions. Each question has five choices. The student guesses randomly at each answer. Find the probability that more than four of them fail the test.

A bag of marbles contains 4 red, 3 blue, 2 green and 1 yellow marble.  Half of the red and green marbles are glass, and all of the other marbles are polished stone.  What is the probability of selecting: Add the colors together to determine how many marbles are in the bag.  This will become the right side of the answer.  Determine how many marbles exactly fit the specified criteria to find the left side.  Remember to reduce if necessary. A yellow stone marble:  Ratio: ____ : ____ A blue or green stone marble: Ratio:  _____ : _____ Two red marbles in a row without replacement: Ratio:  _____ : _____ Three glass marbles in a row with replacement:  Ratio: _____ : _____

You took  a test with 40 multiple choice questions.  Each question had 5 choices.  What is the probability that you get at least 28 questions correct if you guessed in all of them.

In a blood testing procedure, blood samples from 6 people are combined into one mixture. The mixture will only test negative if all the individual samples are negative. If the probability that an individual sample tests positive is 0.08, what is the probability that the mixture will test positive? Give your answer as a percent rounded to the nearest tenth of a percent.

A student randomly guesses at 7 multiple choice questions.  Each question has five possible answers.  What is the probability that the student gets exactly 3 correct answers?

A bag of marbles contains 4 red, 3 blue, 2 green and 1 yellow marble.  Half of the red and green marbles are glass, and all of the other marbles are polished stone.  What is the probability of selecting: Add the colors together to determine how many marbles are in the bag.  This will become the right side of the answer.  Determine how many marbles exactly fit the specified criteria to find the left side.  Remember to reduce if necessary. A yellow stone marble:  ____ : ____ A blue or green stone marble:  _____ : _____ Two red marbles in a row without replacement:  _____ : _____ Three glass marbles in a row with replacement:  _____ : _____