8. For a set of 5 true/false questions, no studenthas written all corr

1.	8. For a set of 5 true/false questions, no studenthas written all correct answers and no twostudents have given the same sequence ofanswers. What is the maximum number ofstudents in the class for this to be possible?
Answer» We have formula for nCr = n!/(n-r)!r! By applying the formula we can deduce the solution like this 5C4+5C3+5C2+5C1+5C0 5!/(5-4)!4! +5!/(5-3)!3! +5!/(5-2)!2! +5!/(5-1)!1! +5!/(5-0)!0! 5 + 10 + 10 + 5 + 1 = 31 tysm without formula i want

8. For a set of 5 true/false questions, no studenthas written all correct answers and no twostudents have given the same sequence ofanswers. What is the maximum number ofstudents in the class for this to be possible?

Answer»

We have formula for nCr = n!/(n-r)!r!

By applying the formula we can deduce the solution like this

5C4+5C3+5C2+5C1+5C0

5!/(5-4)!4! +5!/(5-3)!3! +5!/(5-2)!2! +5!/(5-1)!1! +5!/(5-0)!0!

5 + 10 + 10 + 5 + 1 = 31

tysm

without formula i want