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osanseviero
 2 years ago
In a school there are 300 matriculated students (some probability problems)
osanseviero
 2 years ago
In a school there are 300 matriculated students (some probability problems)

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osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0210 of those 300 enter the class. 80% of the students that enter the class get good grades, 15% of the students that dont enter the class get good grades

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0If we chose a random matriculated student, which is the probability of him: 1. Being in the class 2. Don't being in the class and getting good grades 3. Getting good grades

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1383272509491:dw

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0How to do the second?

HawkCrimson
 2 years ago
Best ResponseYou've already chosen the best response.1first you find how many students that arnt in the class and are getting gud grades so 90 x 15/100 = 27/2 feel sorry for the student that lost a limb :(

HawkCrimson
 2 years ago
Best ResponseYou've already chosen the best response.1cause apparently in that class there is half of a student :'(

HawkCrimson
 2 years ago
Best ResponseYou've already chosen the best response.1haha xD well there 90 students not in the class, and only 15% of the 90 pass, so 90 x 15/100

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.090 persons is the 30% of total

HawkCrimson
 2 years ago
Best ResponseYou've already chosen the best response.1and then 27/2 / 300 = 9/200

HawkCrimson
 2 years ago
Best ResponseYou've already chosen the best response.1umm, i thought i was xD

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.027/2 is the number of persons that got a good grade

HawkCrimson
 2 years ago
Best ResponseYou've already chosen the best response.1and didnt come to class but now idk

HawkCrimson
 2 years ago
Best ResponseYou've already chosen the best response.1normally when i got half a person it was a sign that something went wrong but my reasoning makes sense atleast to me lol

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0Can you repeat your reasoning again? (sorry)

HawkCrimson
 2 years ago
Best ResponseYou've already chosen the best response.190 students are people that do not come to class, 15% of these students are students that do well in exams. therefore 90 x 15/100 = 27/2

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0And for the third question?

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0We know that 9 people that did not entered got good grades. We need to see the ones that did come in

HawkCrimson
 2 years ago
Best ResponseYou've already chosen the best response.1it would be 210 x 80/100 + 27/2

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0168 entered and passed, 9 entered and passed, so 176

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0the 9 did not enter and did pass*

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0Sooo...176...and 44/75 (check please)

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0Probability of entering and getting a good grade

HawkCrimson
 2 years ago
Best ResponseYou've already chosen the best response.1but it should be 168 + 27/2 because the number of students that didnt come to class and are getting gud grades are 27/2

HawkCrimson
 2 years ago
Best ResponseYou've already chosen the best response.1so 195/2 students pass and the probability of the teacher choosing one is 195/2 /300

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0Sorry, internet crashed

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.0Last one is: Chance of selecting a student that have passed and entered the class

osanseviero
 2 years ago
Best ResponseYou've already chosen the best response.07/10 * 8/10 = 56/100 = 38/50= 19/25
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