ياجماعة هادي الاسئلة من الاختبارات بس ماعرفت احلها ياليت لو احد يعرف طريقة حلها يقلي الله يسعدكم
37. An instructor gives a 100 point examination in which the grades are normally
distributed. The mean is 60 and the standard deviation is 10. If there are 5% a+ . Find
the lowest possible score to get a+?
A) 96
b) 76.5
c) 43.5
d) 61.3
34. If 3% of calculators are defective, find the standard deviation of the defectives in
300 calculators?
A) 2.95
b) 0.79
c) 8.73
d) 9
33. A student takes a 7 question multiple choice quiz with 4 choices for each question. If
the student guesses at random on each question, what is the probability that the
student gets exactly 3 questions correct?
A) 0.346
b) 0.043
c) 0.173
d) 0.130
1. How many different ways can four people: Andy, betty, cindy, and doug, sit in a
row at the cinema if andy and betty must sit together?
A) 18
b) 6
c) 12
d) 24