Assume that random guesses are made for seven multiple choice questions on an SAT​ test, so that there are n=7 ​trials, each with probability of success​ (correct) given by p=0.35. Find the indicated probability for the number of correct answers.   Find the probability that the number x of correct answers is fewer than P(X<4)=

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section9.3: Binomial Probability
Problem 2E: If a binomial experiment has probability p success, then the probability of failure is...
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1.)
Assume that random guesses are made for
seven
multiple choice questions on an SAT​ test, so that there are
n=7
​trials, each with probability of success​ (correct) given by
p=0.35.
Find the indicated probability for the number of correct answers.
 
Find the probability that the number x of correct answers is fewer than
P(X<4)= 
 
 
2.) 
Assume that when adults with smartphones are randomly​ selected,
59​%
use them in meetings or classes. If
7
adult smartphone users are randomly​ selected, find the probability that exactly
2
of them use their smartphones in meetings or classes.
 
The probability is ________?
 
 
 
 
 
 
 
 
 
 
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