The marks of the students in a certain examination are normally distributed with mean marks as 40% and standard deviation marks as 20%. On this basis 60% of students failed. The results was moderated and 70% of students passed . Find the pass mark before and after moderation​

Question 6 (10 points) ✓ saved what is the center of a circle described by the equation x2 + y2 +10y = -16? . (0,-5) (0,5) (-5,0) (5,0)

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

How do i do this activity, is appreciated