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Daniel [21]
3 years ago
7

Of the 85% of the students in a class who studied for a test,75% passed the test.Of the 15% of the students who didn't study,30%

passed.Whats the probability of passing?
Mathematics
1 answer:
galina1969 [7]3 years ago
3 0
Probability works for any given number, so we will assume there are 100 students. Of those 100, 85 of them studied. Since 75% of 85 students passed, we will multiply 85 by 0.75. This gives us 60. So of the students who studied, 60 of them passed. Of the 15 students that didn’t study, 30 percent passed. So we multiply 15 by 0.3. This gives us 4.5 students. Add up 60 and 4.5, and you get 64.5. The probability of passing is 64.5%. If you want to round up, it would be 65%. If you want to round down, it would be 64%. But the most precise answer is 64.5%.
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Let the number of ride tickets = x tickets.

And the total cost is given by y.

Fair charges $1.25 per ticket for the rides.

Johnny bought = 25 tickets.

Therefore, cost of 25 tickets @ $1.25 per ticket = 25 × 1.25 = $31.25

Total amount spent at the fair = $43.75.

Fair admission charge = Total amount spent - Cost of 25 tickets = 43.75 - 31.25 =$12.50.

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3 years ago
A rectangle has sides of length 6.1cm and 8.1cm correct to one decimal place.
tamaranim1 [39]
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6.1x8.1
8 0
3 years ago
Read 2 more answers
Solve for m.<br> 4m^n = 49
Sever21 [200]

Answer:

m=49/4

Step-by-step explanation:

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Answer:

The question asks arc length:

\frac{ \frac{ \frac{2\pi}{3} }{2\pi} }{1}  =  \frac{1}{3}

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Good luck!

Intelligent Muslim,

From Uzbekistan.

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