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Due Date
These three problems have a 1 week deadline. They are worth 5 marks each. You must blog your answers for these problems by:
Thursday, February 11, 2010
17/30 kids in the class are girls. 3/17 girls are A studnts. 2/13 boys are A students. 13/30 kids are boys. 5/30 kids in the class are A students. There are 30 students in the class.
ReplyDeleteIris
The theoretical probability of choosing an A student or a girl is 19 in 30. This is because there are 17 girls and 3 of them are A students so you subtract the 3 girls from the number of A students, that leaves 2 more A students. So you add 17 + 2 = 19. The answer is 19 in 30. Though the experimental probability might be different.
ReplyDeletethe chance is 15 over 30 or 1 over 2 or 0.50 or 50%
ReplyDelete22 of 30 cuz 17 girls and 5 A students but i dunno if im answering rite so whateves
ReplyDeleteI don't get this question, so i'll say all answers that I think are possible. Girl: 17 over 30. A student: 5 over 30. Girl A student: 3 over 30.
ReplyDeletefor the overall girls in the class including the A students it is 17/30. for choosing an A girl student it is 3/30.or out of ONLY the A students it would be 3/5. Or if it with out the A student "group" it would be 14/25 girls. and for the chance of picking an A student overall including the boys it is 5/30. how i got my 1st answer was: there are 30 students so each answer has to be over 30. and it already told me that there are 17 girls, so i did 17/30. and i took the sma emethod to find all the other answers i have. i put like 4 answers because i did not understand the "girl" question, i didn't know if it was out of the whole class of without the a students or only the a student so i worte all the answers.
ReplyDelete~Adele~
Girl= 17 in 30
ReplyDeleteA student= 5 in 30
The probability is of choosing an a student or a girl is 19/30. I know this because It says that five students are a students. But, three are girls, so you subtract 3. I do this because if you didnt you would be counting three girls over again. And if people are not females, then they are males, so the answer is girls+male a students (2)= 19, and there are 30 students in the class, so 19/30.
ReplyDeleteA=5=3g,2b
ReplyDelete3g=17g+2b=19g+b
19/30
The probability of choosing a girl would be 17/30, and the probanility of choosing an A student is 5/30.
ReplyDeleteThe probability that you pick a girl is 17/30. The probability that you pick an A student who is not a girl is 2/30. If you add those together it equals 19/30.
ReplyDeleteFor girls, 17/30
ReplyDeleteA students, 5/30
I'm probably wrong, though.
The probability of chosing a girl is 17 out of 30. the probability of chosing an A student is 5 out of 30 or 6%. My reasons for thinking this are: if there are 17 girls out of 30 students and you want to know the probability of choosing one of the girls out of the 30 then it is 17 out of 30 because there are 17 girls in the 30 you are picking from. It's the same thing with A students. You know that five out of the 30 are A students so the probability is 5 out of 30 or 6%. because if you were to pick out of the 30 students and you wanted to get an A student there would only be five of them to choose from. Also I know that t is 6% because 6x5=30. So basically the probability of picking a girl is likely and an A student is unlikely-but still very possible. that was just incase you wanted it in words... -Emily (Sorry for spelling or grammar mistakes as well as my weird way of explaning.)
ReplyDeleteThe chances of choosing a girl is 17/30 and the chances of choosing an A student is 5/30. However the chances of choosing a girl or an A student is 22/30 or 73%.
ReplyDeleteThe probability of choosing a girl is 3/30. The probability of choosing an A student is 5/30.
ReplyDeleteI'm sorry I ment to say that the probability of choosing a girl student is 17/30.
ReplyDeleteHey,
ReplyDeleteMy answer is for the probability of choosing an A student is 5/30. The probability of choosing a girl, is 17/30. This was easier then I thought!
*Katty*