Question

Need fast help: 20 students are writing a test. Each of them has a 75% chance to succed. How high is the chance, that 17 students succed?

Answer 1

*that at least 17 succed.

Answer 2

probability that 17 students succeed is 85%

Answer 3

lol are you *in* a test? x)

Answer 4

but since each of their's chance is NOT 100% then .....??

Answer 5

i think it's 1-20c3 * 0.25*0.25*0.25

Answer 6

Nope, but I'm going to be in at least 2 hours :P

Answer 7

haha good cramming ;P

I was gonna try to answer and then decided I didn't want to make you fail x) Good luck though!
oh and *succeed ;)

Answer 8

So 1-20c3*0,25*0,25*0,25 = 16,8125 % ?

Answer 9

oh.....i was 16,8125 ?!

Answer 10

*it