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Firdavs [7]
3 years ago
12

The Environmental Protection Agency (EPA) has contracted with your company for equipment to monitor water quality for several la

kes in your water district. A total of 10 devices will be used. Assume that each device has a probability of 0.01 of failure during the course of the monitoring period. What is the probability that none of your devices fail
Mathematics
2 answers:
anastassius [24]3 years ago
7 0

The probability that none of the devices fails happens when x = 0.

P(none fail) = 1(0.01)^(0)•(1 - 0.01)^(10)

P(none fail) = (0.01)^0•(0.99)^(10)

P(none fail) = 0.90438

sergij07 [2.7K]3 years ago
7 0

Answer:

Probability that none of your devices fail is 0.9044.

Step-by-step explanation:

We are given that the Environmental Protection Agency (EPA) has contracted with your company for equipment to monitor water quality for several lakes in your water district. A total of 10 devices will be used. Assume that each device has a probability of 0.01 of failure during the course of the monitoring period.

The above situation can be represented through Binomial distribution;

P(X=r) = \binom{n}{r}p^{r} (1-p)^{n-r} ; x = 0,1,2,3,.....

where, n = number of trials (samples) taken = 10 devices

             r = number of success = none fail

            p = probability of success which is probability of failure during the

                   course of the monitoring period, i.e; 0.01.

<em>LET X = No. of failures</em>

So, it means X ~ Binom(n=10, p=0.01)

Now, Probability that none of your devices fail is given by = P(X = 0)

      P(X = 0) =  \binom{10}{0} \times 0.01^{0} \times (1-0.01)^{10-0}

                    = 1 \times 1 \times 0.99^{10} = 0.9044

Hence, the probability that none of your devices fail is 0.9044.

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