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A PHP Error was encountered

Severity: Warning

Message: Undefined array key "userid"

Filename: views/question.php

Line Number: 212

Backtrace:

File: /home/statpmkj/public_html/application/views/question.php
Line: 212
Function: _error_handler

File: /home/statpmkj/public_html/application/controllers/Questions.php
Line: 416
Function: view

File: /home/statpmkj/public_html/index.php
Line: 315
Function: require_once

Hospital records show that of patients suffering from a certain disease, 75% die of it. What is the probability that of 6 randomly selected patients, 4 will recover?

p recover = 1-p recover  
p die =  0.75
n =  6
x = 4
 p recover =  0.25
   
   
Probability 4 will recover: 0.0330
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