Answer:
about 63.1%
Step-by-step explanation:
For the first song, it is certain it isn't a duplicate. For the second song, the probability that it is not a duplicate is 4999/5000. The probability the third song is not a duplicate is 4998/5000.
Hence the probability that none of the 100 songs is a duplicate is ...
5000!/4900!/5000^100 ≈ 0.369120
Then the probability that one or more is a duplicate is ...
1 - 0.369120 ≈ 0.630880
Set up a proportion
90/x = 60/100
60x = 9000
x = 150
if you're wondering why I used 60 instead of 40 in the proportion it is because $90 is 60% of the original price, not 40%
hope this helps!
Respuesta:
(segundo + 3) (segundo + 2) = 0
Explicación paso a paso:
Dada la expresión cuadrática b² + 5b + 6, debemos factorizarla;
b² + 5b + 6 = 0
b² + 2b + 3b + 6 = 0
b (segundo + 2) +3 (segundo + 2) = 0
(segundo + 3) (segundo + 2) = 0
Por tanto, el factor requerido es (b + 3) (b + 2) = 0
Answer:
384000
Step-by-step explanation:
An excluded value is one where the bottom of the fraction = 0.
In your case 1-3x=0
1=3x
x=1/3
At this point, the function does not exist. If you were to draw a graph of it, there wouldn't be a y-value corresponding to x=1/3.
