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lutik1710 [3]
2 years ago
5

Jon and Becky measured the circle-shaped part of a sun they drew on the sidewalk.

Mathematics
1 answer:
Nuetrik [128]2 years ago
3 0

Answer:

C i think

Step-by-step explanation:

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Assume that when adults with smartphones are randomly selected, 54% use them in meetings or classes (based on data from an lg sm
GuDViN [60]
Answer: 0.951%

Explanation:

Note that in the problem, the scenario is either the adult is using or not using smartphones. So, we have a yes or no scenario involved with the random variable, which is the number of adults using smartphones. Thus, the number of adults using smartphones follows the binomial distribution.

Let x be the number of adults using smartphones and n be the number of randomly selected adults. In Binomial distribution, the probability that there are k adults using smartphones is given by

P(x = k) = \frac{n!}{k!(n-k)!}p^k (1-p)^{n-k}

Where p = probability that an adult is using smartphones = 54% (since 54% of adults are using smartphones). 

Since n = 12 and k = 3, the probability that fewer than 3 are using smartphones is given by

P(x \ \textless \  3) = P(x = 0) + P(x = 1) + P(x = 2)
\\ \indent = \frac{12!}{0!(12-0)!}(0.54)^0 (1-0.54)^{12-0} + \frac{12!}{1!(12-1)!}(0.54)^1 (1-0.54)^{12-1} + \\ \indent \frac{12!}{2!(12-2)!}(0.54)^2 (1-0.54)^{12-2}
\\
\\ \indent = \frac{12!}{(1)(12!)}(0.46)^{12} + \frac{12(11!)}{(1)(11!)}(0.54)(0.46)^{11}+ \frac{12(11)(10!)}{(2)(10!)}(0.54)^2(0.46)^{10}
\\
\\ \indent = (1)(0.46)^{12} + (12)(0.54)(0.46)^{11}+ (66)(0.54)^2(0.46)^{10}
\\ \indent \boxed{P(x \ \textless \  3) \approx 0.00951836732 }


Therefore, the probability that there are fewer than 3 adults are using smartphone is 0.00951 or 0.951%.


5 0
3 years ago
What is the value of x in the equation 2x + 3y = 6 ?
erastovalidia [21]

Answer:

x = -3/2y + 3

Step-by-step explanation:

2x + 3y = 6

2x = -3y + 6

x = -3/2y + 3

3 0
3 years ago
Please help with the even numbers!! example, 2,4,6,8,10 :)) ty!!
Murljashka [212]

1) 2 with a small 4 at the top like an exponent

5 0
3 years ago
Read 2 more answers
Over a 12 hour period the students estimate that 2,400 bees will leave the hive. How many bees should they expect to travel west
vazorg [7]
240 divide it 

2400/10

hope this helps

8 0
2 years ago
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How do I write this as an equation
Lana71 [14]
Let x be the number of children
Let y be the number of adults

x + y = 4
4x + 7y = 19
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3 years ago
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