Hello to all,

I have an question that "In 20 questions of true false student require 8 right answer to pass to passout. What is the probability that student will fails?"

Please help me to solve this.

Thnks in advance.

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- October 4th 2009, 09:43 PMrax012True false question probability
Hello to all,

I have an question that "In 20 questions of true false student require 8 right answer to pass to passout. What is the probability that student will fails?"

Please help me to solve this.

Thnks in advance. - October 4th 2009, 10:13 PMSoroban
Hello, rax012!

Youe grammar is strange . . .

Quote:

In a test of 20 true-false questions, a student needs at least 8 right answers to pass.

What is the probability that student will fail?

*guesses*the answers.

To fail, he must have less than 8 right answers.

There are 8 cases to consider . . .

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