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fredd [130]
3 years ago
14

Help please I’ve been stuck here for hours on this problem would really appreciate it so much. Can’t figure out those two blanks

Mathematics
1 answer:
elena-s [515]3 years ago
7 0
The answers are 2.4 hours and 20 hours

The equation you have is correct. To solve the next ones you use that equation and plug in the number of hours given. So for 31 hours of babysitting you’d do this:
12(32)+15c=420
384+15c=420
15c=36
c=2.4

Same thing for 10 hours babysitting
12(10)+15c=420
120+15c=420
15c=300
c=20
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A high school guidance counselor determined the following information regarding students and their likelihood of playing a sport
iogann1982 [59]

Conditional Probability

Given two events A and B (not excluding), the probability that A occurs given that B has occurred is called a <em>conditional probability</em> and is calculated as:

P(A|B)=\frac{P(A\cap B)}{P(B)}

Where P(A∩B) is the probability that A and B occur simultaneously and P(B) is the probability that B occurs.

Now with the given data, we must find the values of the required probabilities.

30% of the students play a sport (S), this means that:

70% of the students don't play a sport (NS).

65% of the students have a job.

Note that there could be students who both play sports and have a job.

Of the 30% of the students who play a sport, 50% have a job. This means that:

15% of the students play a sport and don't have a job

15% of the students play a sport AND have a job

65% - 15% = 50% of the students have a job and don't play a sport

That last number is the numerator of the equation given above:

P(A∩B) = 0.5

The event B corresponds to students that don't play a sport (NS), thus:

P(B) = 0.7

Thus we have:

P(A|B)=\frac{0.5}{0.7}=\frac{5}{7}

The required probability is 5/7 or 0.7143

4 0
1 year ago
Select all of the statements that are true about the following expression: 5x3+x4−8
Lapatulllka [165]
I think the correct answer is c
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3 years ago
Help me please<br> thx so much<br> have a good one
vovikov84 [41]

Answer:

what grade r u in cause I have never seen that or I would help u out

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3 years ago
PLSS HELP<br><br> -21-9<br> ———-<br> -5
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Answer:

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reduce the expression  and if possible do that by cancelling the common factors :)

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2 years ago
Stuck on this Question !!
Veseljchak [2.6K]
I got you bro the answer is c

5 0
3 years ago
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