You know actually
It's not the calculator's fault LOL. any decent calculator would give an error or not work for that question.
The question doesn't make any sense.....
Here is the answer I was about to post:
doesn't make sense because of the -^
What do you mean by -^ ?
The - by itself is a valid operation.
The ^ by itself is a valid operation.
The credit goes to hectictar for figuring this out she just sent this is a private message I told her I would post it!!!
But -^ together is not a valid operation.
It's just like saying...
What is 5-x3 =?
"What is 5 minus times 3 ?"
See? It doesn't make any sense!
You didnt Cphills is like this
Hear is a answer from Cphill
P(< 15 from Box A) = (14/20) = 7/10 (1)
P(even or > 25 from Box B) =
P(even from Box B) + P(>25 from Box B) - P(even and > 25 from Box B) =
(10/20) + (5/20) - (3/20) = 12/20 = 3/5 (2)
So.....the probability of (1) and (2) = 7/10 * 3/5 = 21 / 50
See I hope this helps!