exercise your brain
« previous next »
Pages: [1]   Go Down

Author Topic: exercise your brain  (Read 1815 times)

Offline jas_fluidm

  • Faculty
  • Sr. Member
  • *
  • Posts: 291
    • View Profile
exercise your brain
« on: August 04, 2013, 03:11:35 PM »
A committee of three is chosen from five councilors - Adams, Burke, Cobb, Dilby and Evans.

What is the probability Burke is on the committee?

Share
Logged

Offline jas_fluidm

  • Faculty
  • Sr. Member
  • *
  • Posts: 291
    • View Profile
Re: exercise your brain
« Reply #1 on: August 04, 2013, 03:12:05 PM »
ans: 3/5
Logged

Offline jas_fluidm

  • Faculty
  • Sr. Member
  • *
  • Posts: 291
    • View Profile
Re: exercise your brain
« Reply #2 on: August 04, 2013, 03:17:10 PM »
Town B is further east than town A, it is 20 miles north of town A and the distance AB in a straight line is 45 miles.
What is the bearing of town B from town A?
Logged

Offline jas_fluidm

  • Faculty
  • Sr. Member
  • *
  • Posts: 291
    • View Profile
Re: exercise your brain
« Reply #3 on: August 04, 2013, 03:20:02 PM »
cos(x°) = adjacent/hypotenuse = 20/45 = 0.444...
x° = cos-1(0.444...) = 63.6°
Logged
Pages: [1]   Go Up
« previous next »