A 20% of college of engineering students prefer white cell phones. What is the approximate probability that among 1000 cell phone users:

a) Between 170 & 185 inclusive use white cell phone.

b) At least 210 users use white phone.

c) Exactly 260 users prefer white phone.

d) What is the value such that probability that the number of white cell phone users exceed the value is 0.01?

Answer rating: 100% (QA)

X number of engineering students prefer white cell phones X ... View the full answer