# Question: A true false test has 40 questions A passing grade is

A true/false test has 40 questions. A passing grade is 60% or more correct answers.

a. What is the probability that a person will guess correctly on one true/false question?

b. What is the probability that a person will guess incorrectly on one question?

c. Find the approximate probability that a person who is just guessing will pass the test.

d. If a similar test were given with multiple-choice questions with four choices for each question, would the approximate probability of passing the test by guessing be higher or lower than the approximate probability of passing the true/false test? Why?

a. What is the probability that a person will guess correctly on one true/false question?

b. What is the probability that a person will guess incorrectly on one question?

c. Find the approximate probability that a person who is just guessing will pass the test.

d. If a similar test were given with multiple-choice questions with four choices for each question, would the approximate probability of passing the test by guessing be higher or lower than the approximate probability of passing the true/false test? Why?

## Relevant Questions

A large community college district has 1000 teachers, of whom 50% are men and 50% are women. In this district, administrators are promoted from among the teachers. There are currently 50 administrators, and 70% of these ...A random sample of likely voters showed that 55% planned to vote for Candidate X, with a margin of error of 2 percentage points and with a 95% confidence level. a. Use a carefully worded sentence to report the 95% confidence ...In May 2012, a Gallup Poll showed that 63% of randomly surveyed U.S. adults said the United States benefits from having a rich class. (The proportion was unchanged from 1990. The percentage was higher for Republicans than ...In a 2013 Pew Poll, 36% of Republicans and 28% of Democrats agreed with the statement “Obesity impacts individuals, but doesn’t have a major impact on society.” A 95% confidence interval for the difference in these ...Ondansetron (Zofran) is a drug used by some pregnant women for nausea. There was some concern that it might cause trouble with pregnancies. An observational study was done of women in Denmark (Pasternak et al. 2013). An ...Post your question