Question

Find P(not a 1).
1 2 3 4
P(X) 0.30 0.40 0.15 0.15

Answer 1

\[P(\text{not 1})=1-P(1)\]

Answer 2

It says the answer is 0.7 how is that possible?

Answer 3

because you either get a one, or you do not
if the probability you get a 1 is 0.3 then the probability you do not get a 1 is \(1-.3=.7\)

Answer 4

Okay! thanks alot <3

Answer 5

think of it this way
if it rains 30% of the time, then it does not rain 70% of the time
make sense right?
yw

Answer 6

Yes.

Answer 7

good! are there more?

Answer 8

I have one more