Question

A multiple-choice test contains 25 questions, each with 4 answers. Assume a student just guesses on each question. (a) What is the probability that the student answers more than 20 questions correctly? (b) What is the probability that the student answers less than 5 questions correctly? (a) i .10^ i Give the answer in scientific notation with numbers rounded to the nearest integer (e.g. 3·10^-14). (b) i Round your answer to four decimal places (e.g. 0.9876).

Name: a multiple choice test contains 25 questions each with 4 answers assume a student just guesses on each question a what is the probability that the student answers more than 20 questions corr 86017
Uploaded: 2021-12-10T04:52:38-08:00
Duration: 4 min 38 s
Channel: Narayan Hari
Description: a multiple choice test contains 25 questions each with 4 answers assume a student just guesses on each question a what is the probability that the student answers more than 20 questions corr 86017

          A multiple-choice test contains 25 questions, each with 4 answers. Assume a student just guesses on each question.
(a) What is the probability that the student answers more than 20 questions correctly?
(b) What is the probability that the student answers less than 5 questions correctly?
(a) i .10^ i Give the answer in scientific notation with numbers rounded to the nearest integer (e.g. 3·10^-14).
(b) i Round your answer to four decimal places (e.g. 0.9876).

a multiple choice test contains 25 questions each with 4 answers assume a student just guesses on each question a what is the probability that the student answers more than 20 questions corr 86017

Added by Jacob M.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Narayan Hari

12/10/2021

Step 1

Let $n$ be the number of questions, so $n = 25$. Let $p$ be the probability of answering a question correctly by guessing. Since there are 4 answers and only one is correct, $p = 1/4 = 0.25$. Let $q$ be the probability of answering a question incorrectly, so $q = Show more…

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A multiple-choice test contains 25 questions, each with 4 answers. Assume a student just guesses on each question. (a) What is the probability that the student answers more than 20 questions correctly? (b) What is the probability that the student answers less than 5 questions correctly? (a) i .10^ i Give the answer in scientific notation with numbers rounded to the nearest integer (e.g. 3·10^-14). (b) i Round your answer to four decimal places (e.g. 0.9876).