Wednesday

April 1, 2015

April 1, 2015

Posted by **HM** on Wednesday, November 9, 2011 at 4:18am.

Could some one please help me?

And explain to me how they got the answer?

and is there another way besides the tree method?

- PROBABILITY MATH -
**Reiny**, Wednesday, November 9, 2011 at 8:08amAll we have to exclude is the case when he guessed all of them wrong

that prob would be (1/2)^10 = 1/1024

so the prob of getting at least one correct is 1 - 1/1024 = 1023/1024

- PROBABILITY MATH -
**ebony**, Monday, May 14, 2012 at 12:28amTake 10/2=5

possibility of 5 right or 5 wrong because there is only two possible outcomes

2/100 = .50 (True and False Outcomes)

There are a total of 10 questions

.50^10 questions = .0009765625 rounded = .0009777

use the complement formula 1-P=

1-.0009777 = .9990223 that there is at least once correct answer

**Answer this Question**

**Related Questions**

math - An unprepared student makes random guesses for the ten true or false ...

STAT - A student takes a ten-question true-false quiz, but did not study and ...

Statistics - Please help. Find the probability of getting 2 hearts if the cards ...

Math - A multiple - choice quiz contains 5 questions with 4 choices for each ...

Statistics - On a very short quiz, there is one multiple choice question with 5 ...

Math - On a true-false test, each question has exactly one correct answer: true...

Statistic - A quiz consists of 10 multiple-choice questions. Each question has 5...

Statistics - A student makes random guesses on 6 multiple-choice questions. One ...

math (stats) - A biology professor gives a surprise quiz consist of a true/false...

statistic and probability - There are two independent multiple-choice quizzes ...