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vfiekz [6]
3 years ago
11

Please help with this one question that I've been stuck on!!!

Mathematics
1 answer:
Elodia [21]3 years ago
6 0

Answer:

it will be B

Step-by-step explanation:

PLS GIVE MARK ME AS BRAINLESS

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"the life length x (in years) of a dvd player" is exponentially distributed with mean 5 years. what is the probability that a mo
loris [4]
The exponential distribution is:
\lambda e^{- \lambda x}
where \lambda = \frac{1}{mean}=\frac{1}{5}

The probability we want is how likely will a dvd player last more than 8 years, given it has already lasted 5 years
To find this, you use conditional probability.
P(A|B) = \frac{P(A and B)}{P(B)}
where A is P(x>8) and B is P(x>5)
To find these probabilities, integrate over the distribution:
P(x \ \textgreater \ N) = \int_N^{\infty} \frac{1}{5} e^{-x/5} dx = e^{-N/5}

Sub into conditional probability formula:

P(x \ \textgreater \ 8 | x\ \textgreater \ 5) = \frac{P(x\ \textgreater \ 8)}{P(x\ \textgreater \ 5)} = \frac{e^{-8/5}}{e^{-5/5}} = e^{-3/5} = 0.549

Final Answer: Given a dvd player is more than 5 years old, the probability that it will last another 3 more years is about 54.9%
3 0
3 years ago
Round 8.36 to the nearest one decimal place
BartSMP [9]
8.4 because 6 would round up to 10 and 10+30 =40 for 8.40 or just 8.4
4 0
3 years ago
The mode interval in a histogram is the interval that has the highest frequency.
raketka [301]
This is true. 

When we're talking about the mode, we're usually talking about the number which has the highest frequency in a given set of numbers. For example, out of the numbers:

1 2 3 4 5 6 5 4 5 5 5 

5 will be the mode.
4 0
3 years ago
(I need help again)
zheka24 [161]

Answer:

5

Step-by-step explanation:

on a graph all of the regular numbers are on the left

5 0
3 years ago
Read 2 more answers
8(6g- 5h+8) I need help.
motikmotik

Answer:

The answer is 48g-40h+64

5 0
3 years ago
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