Using the widget below, answer question a) What is the probability that he gives a correct answer to at least 33 of the 50 “not too difficult” questions.  📣

Find the previous number in the spreadsheet below. What if the question had been :

What is the probability that he gives a correct answer to at least 43 of the 50 “not too difficult” questions ? 📣

Question c) What grade can Dawson expect to get ? 

d) Is the probability that Dawson passes the exam greater than 50% ? 

How would you calculate its exact value ? 

Bonus : we could rewrite this exercise so that despite having a mean value greater than 68, less that 50 % of the candidates pass the exam.