Answer:
0.0656
Step-by-step explanation:
For each message, we have these following probabilities:
90% probability it is spam.
10% probability it is legitimate.
Compute the probability that the first legitimate e-mail she finds is the fifth message she checks:
The first four all spam, each with a 90% probability.
The fifth legitimate, with a 10% probability.
Answer:
1/3
Step-by-step explanation:
There are <u>four</u> 5's on the dial out of 12 possible stops
4/12 = 1/3 theoretical
Normally, we could add exponents.
however, that only is possible when the bases are the same
recall what exponents mean
12³=12*12*12
so we cannot add exponents for 12³*11³ because that means 12*12*12*11*11*11
it would not equal 12⁶ or 11⁶
or you could refer to the rule
notice when x=x then we can add the bases
fun fact below
we can reverse a previous exponential rule like this
since
then
therefor
we can't add the exponents because the bases are not the same
12/15,7/25,3/7,3/5 should be correct because this is what my teacher taught me in fourth grade.