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Alexus [3.1K]
3 years ago
10

Twelve people are given two identical speakers, which they are asked to listen to for differences, if any. Suppose that these pe

ople answer simply by guessing. Find the probability that three peo
Mathematics
1 answer:
ruslelena [56]3 years ago
7 0

Answer:

0.0537

Step-by-step explanation:

This follows a binomial distribution with : n

Number of trials 'N' = 12 ; Probability of success (difference between speakers) 'p' = 1/2 or 0.5 ; Probability of failure (no difference b/w speakers) = 1/2 or 0.5 ; No of success 'r' = 3

P (X = 3) = N C r. (p)^r.(q)^(n-r)\\

= 12C3 (0.5)^3 (0.5)^9

0.0537

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Solve the equastion for x + 2 1/2 =10
Virty [35]

Answer:

x= 7 1/2

Step-by-step explanation:

Subtract the 1/2 to get it out of the way (whatever you do on one side of the = sign you have to do to the other)

So 10- 1/2= 9 1/2

Subtract the 2 to get it out of the way

9 1/2-2=

7 1/2

Hope it helped :)

8 0
2 years ago
Express the radical using the imaginary unit, i.
MrMuchimi

Answer:

±3i

Step-by-step explanation:

Given the value ±√-9, we are to express the value using the imaginary number 'I'

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. Mallorie has $12 in her wallet. If this is 20% of her monthly allowance, what is her monthly allowance?​
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kgalante.weebly.com/uploads/2/3/5/7/23573232/homework_practice_solve_percent_problems_answers.pdf

Step-by-step explanation: this will help you out

6 0
3 years ago
There are 1,200 students at roosevelt middle school. There are 700 boys at the school. What percentage of the students at roosev
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3 years ago
Which expressions are equivalent to the one below? Check all that apply.
dem82 [27]

Answer:

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so, Log 2 - Log 4 = Log ( 2/4)

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Also from the law

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Recall: Log 1 = 0

which implies : Log 1 - Log 2 = 0 - Log 2

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Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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