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Westkost [7]
3 years ago
6

A gallup poll of 1236 adults showed that 12% of the respondents believe that it is bad luck to walk under a ladder. consider the

probability that among 30 randomly selected people from the 1236 who were polled, there are at least 2 who have that belief. given that the subjects surveyed were selected without replacement, the events are not independent. can the probability be found by using the binomial probability formula? why or why not?
Mathematics
1 answer:
solmaris [256]3 years ago
7 0
The probabillity can be found by using binomial probability formular considering that the event is discrete in nature and there are two possiple outcomes.
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The last time Sierra played softball, she hit the ball 45% of the times she was at bat. Based on this information, how many time
Ymorist [56]

Answer:

Number of times she will hit the ball  the next time she plays softball if she is at bat 20 times = 9 times

Step-by-step explanation:

Percentage of times Sierra hit the ball when she was at bat playing softball= 45%

So, we can find:

Number of times she will hit the ball  the next time she plays softball if she is at bat 20 times = \textrm{45\% of 20 times} =0.45\times 20=9\ times

3 0
3 years ago
What is a possible factorization of a polynomial with 3, –2, and i as zeros?
storchak [24]
It should be b but i don’t have paper with me so i’m not sure
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3 years ago
A box contains 8 videotapes and 5 DVDs. I’m how many ways can one videotape and one DVD be selected?
Art [367]

Answer:

40

Step-by-step explanation:

8x5=40

5 0
3 years ago
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Thomas bought 80 tickets for rides at an amusement park. Each ride cost five tickets, Thomas has been on X right so far. Select
dsp73

Answer:

A. 80-5x

Step-by-step explanation:

Let the number of rides be represented by = x

Thomas bought 80 tickets for rides at an amusement park. Each ride cost five tickets, Thomas has been on x right so far.

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3 years ago
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Solving systems equations by elimination
pishuonlain [190]
I won't answer them all for you (don't want to cheat - need to learn something).
But for the first one given:

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you set up either x or y (which ever one you want to eliminate) so that one of them cancels.
So this one is easy - you just have to multiply an entire row by negative (doesn't matter which one) - so that the y's will be + and - 

Since they're both 9 and they're subracting NOW - you can eliminate the y value. Now add/subtract the x's. So it'd be -2 or 2 depending on how you eliminated y. Then add the number outside of the = sign. Now just solve for x. After that plug in whatever you got for x into both of the rows. Then find the y value.

Hopefully this wasn't confusing -- reply if it is and I will try to simplify. I can give you contact if you need help with the rest 

Good luck!</span>
3 0
3 years ago
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