SOLUTION: 1)number of ways selecting 6 correct answers from 25 multiple choice questions having 4 options each.(with skipping and without skipping of questions) 2)probability of answering

Algebra ->  Permutations -> SOLUTION: 1)number of ways selecting 6 correct answers from 25 multiple choice questions having 4 options each.(with skipping and without skipping of questions) 2)probability of answering      Log On


   

Question 815305: 1)number of ways selecting 6 correct answers from 25 multiple choice questions having 4 options each.(with skipping and without skipping of questions)
2)probability of answering 5 or more than 5 correct answers from 6 questions having 4 options.





























































Answer by faiz19(4) About Me  (Show Source):
You can put this solution on YOUR website!
1) 25C6*4^19(with skipping) 25C6*3^19(without skipping)
2)6C5*0.25^5*0.75^1+6C6*0.25^6