Assume that random guesses are made for 4 multiple-choice questions on a test with 5 choices for each question, so that there are nequals4 trials, each with probability of success (correct) given by p equals 0.20. find the probability of no correct answers.

There is a probability of no correct answers is 0.4096.

Step-by-step explanation:

Since we have given that

Number of trials = 4

Probability of success i.e. getting correct answer = 0.20

We need to find the probability of no correct answers.

We would use "Binomial distribution".

Let X be the number of correct answers.

So, it becomes,

Hence, there is a probability of no correct answers is 0.4096.

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.