Posted by Jen on Wednesday, July 20, 2011 at 10:08am.
Since when can a probabliity be greater then one?
is it 180/500 = 2.7777???
Jen, think. How can 180/500 be more than one.
Jen!! 2.777 is also greater than one!
Prob of at least B is = prob of A +prob of B= (45+180)/totalofallgrades
oooooooh i totally messed up!!! sorry i did 500/180 instead of 180/500....so it would be 0.36....sorry :(
No.
You forgot to include the A grades.
Bobpursley explained that above.
225/500 = 0.45??
Right.
great! i get it...thank u :)
the answer would be D 95
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