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There were 10 selections and 60 arrangements.... Note the difference.... I was about to make the same mistake until i read the qstn again... Anyways u will get 3/5marks if ur probabilities sum up to 1. So u'll lose only two marks.... 1 for mistake and 1 for wrong answer.... Rest marks you will get for defining S as (1,2,4), for making an attempt of finding probability(Method marks) and last for sum of probability to become 1
I dunno exactly what u did there.... But i guess u found arrangements first and then converted them back to selections.... Well if this is the case than u might get 4/5 too. Cheer up even i made a silly mistake. Accidentally multiplied 365days with the probability in last qstn :/
i did equation 2 perfectly correct,please tell me how many marks will i lose??
Got the same
for q6 I didn't get 1210. I calculated it as 13C8 * 2 .can I score atleast 1 mark bcz the question did not state it is necessary that either of the two people are to be selected in the group?
12C8 + 12C8 + 12C9 = 1210
Or quite simply 14C9(total selections) - 12C7(both together).although i used your method
Oh my gwad, yap!!!Or quite simply 14C9(total selections) - 12C7(both together).although i used your method
Yup i did the same method,but the question was of 3 marks so i wondered why we had to take numerous selections but then i did that minus one and it gave same ans so i knew both were correct in the hall.In the exam i did that 3 selection addition one though
First of all, I didn't gave the exam. xDYup i did the same method,but the question was of 3 marks so i wondered why we had to take numerous selections but then i did that minus one and it gave same ans so i knew both were correct in the hall.In the exam i did that 3 selection addition one though
You'll give M1 S1 in Nov?First of all, I didn't gave the exam. xD
But as being junior of one giving exams, they were disusing the questions, they were solving in book, I saw they are doing some long WRONG method, I showed them how to.
P1 P3 S1 S2.
Oh,hows S2?Is it more difficult than S1?
If u found As level math easy after ur O levels. A level math is very easy to tackle.
Dude are we long lost brothersOr quite simply 14C9(total selections) - 12C7(both together).although i used your method
Great minds think alikeDude are we long lost brothers
Cox i did both methods and it confirmed me that ans was 1210
Although I wrote 12C8+12C8+12C9
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