How do you find the number of arrangements?
Notice that in each case the number of arrangements is given by: (Total number of objects)! (Total number of objects – number of objects to be arranged)! The number of arrangements of n different objects taking r at a time is: — =n(n-1)(n-2)…. (n-r+1) n!
How many different 5 letter arrangements are there?
A five-letter word with no repeated letters has 5! = 120 distinct arrangements.
How many ways can an advisor choose 4 students?
495 is the answer.
How do you solve 7C3?
Now, 7C3 = 7! / (7 – 3)! 3! = 7 x 6 x 5 x 4! / 4! x 3!
How to find average grade in assignments 2 and 3?
Find average grade in assignments 2 and 3 needed to get class grade of 85\%. Current grade = Assignment 1 grade = grade1 / max grade1 = 16/20 = 0.8 = 80\% This mean that you have to get an average grade of 90\% in assignments 2 and 3 in order to get class grade of 85\%.
What does the grading system look like in the USA?
If you don’t using the +/- grades, the scale may look like: Above you could find the standard grading system for US schools and universities. However, the grading may vary among schools, classes and teachers. Always check beforehand which system is used in your case. Sometimes the border of passing score is not 60\%, but e.g. 50 or 65\%.
What is the average grade range for an F grade?
If you don’t using the +/- grades, the scale may look like: 1 An A is 90\% to 100\% 2 A B is 80\% to 89\% 3 A C is 70\% to 79\% 4 A D is 60\% to 69\% 5 and finally an F is 59\% and below – and it’s not a passing grade
What is the required grade for a B grade?
Required grade is 80\% (or B-). The final exam grade is equal to 100\% times the required grade, minus 100\% minus the final exam weight (w) times the current grade (g), divided by the final exam weight (w):