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
Five different Maths books, 4 different Science books and 3 different English books are arranged randomly on a shelf.
Five different Maths books, 4 different Science books and 3 different English books are arranged randomly
on a shelf.
a) In how many ways can they be arranged?
b) What is the probability that books of the same subject are together?