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mylen [45]
3 years ago
11

There are 5 radar stations and the probability of a single radar station detecting an enemy plane is 0.55. What is the probabili

ty that the number of stations that detect a plane is no more than 3? Round your answer to nearest hundredth
Mathematics
1 answer:
Lerok [7]3 years ago
4 0
This is a binomial distribution with n = 5, p = 0.55, q = 1 - 0.55 = 0.45, x = 0, 1, 2, 3

P(x) = nCx p^x q^(n - x)
P(x ≤ 3) = 1 - P(x > 3) = 1 - [P(4) + P(5)]
P(4) = 5C4 x (0.55)^4 x (0.45) = 0.2059
P(5) = 5C5 x (0.55)^5 x 1 = 0.0503

P(x ≤ 3) = 1 - (0.2059 + 0.0503) = 1 - 0.2562 = 0.7438
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larisa86 [58]
I don’t know what your trying to find but you basically create an equation, like this
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4 0
2 years ago
What’s the correct answer for this question?
Sliva [168]

Answer:

0.37

Step-by-step explanation:

As shown in table,

The probability of the fruit is orange is P(A) = 0.3

The probability of the fruit is organic is P(B)

The probability of the fruit is orange and organic is P(A⋂B) = 0.11

=> The probability that a randomly selected orange is organic is calculated by applying the conditional probability formula:

P(B|A) =P(A⋂B)/P(A) = 0.11/0.3 = 0.37

=> Option D is correct

Hope this helps!

3 0
3 years ago
URGENT
AlekseyPX

Answer:

hope you can understand

5 0
2 years ago
in a bag of 20 marbles, 4 are blue. what is the probability that one taken at random will not be blue?
Ber [7]
Your answer is 4/5, which is 80% or 0.8

If there are 20 marbles in total in the bag, and 4 blue ones, that means that the probability of taking a blue one is 4/20.

This means that the probability of not taking a blue one is 1 - 4/20, or 20/20 - 4/20, which equals 16/20 = 4/5

I hope this helps! Let me know if you have any questions :)
6 0
3 years ago
Read 2 more answers
Since 2005 the amount of money spent at restaurants in a certain country has increased at a rate of 8% each year. in 2005, about
ale4655 [162]
1.8 x 280billion ok use a calculator
5 0
3 years ago
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