My Math Forum Just a little curious and need help with my school probabilities

 Probability and Statistics Basic Probability and Statistics Math Forum

 October 27th, 2015, 12:36 AM #1 Newbie   Joined: Oct 2015 From: Uk Posts: 2 Thanks: 0 Just a little curious and need help with my school probabilities I have a few statistics about the results of my high school which are: - 61% 5A*-C - 50% 5A*-C (including English and maths) - 10% of all grades being an A or an A* - 21% achieved 10 or more GCSE's A*-C. Not all this information may be useful. Make any assumptions where necessary. What I wanted to find out is, if my results are: 3A*, 4A, 2B, 3C, then what is the probability of achieving these results in this school. There are approximately 200 students in my year.
 October 27th, 2015, 06:26 PM #2 Global Moderator   Joined: May 2007 Posts: 6,641 Thanks: 625 You need to clarify your symbolism. What is 5A*-C?
October 28th, 2015, 12:17 AM   #3
Senior Member

Joined: Dec 2012
From: Hong Kong

Posts: 853
Thanks: 311

Math Focus: Stochastic processes, statistical inference, data mining, computational linguistics
Quote:
 Originally Posted by mathman You need to clarify your symbolism. What is 5A*-C?
5 of the grades belong to the set {A*, A, B, C}.

 October 28th, 2015, 07:54 PM #4 Global Moderator   Joined: May 2007 Posts: 6,641 Thanks: 625 61% 5A*-C 61% of what (200 students?) Who is getting the 5 grades in that interval? Are there other grades? It would helpful if your statement was not so terse.
 October 30th, 2015, 10:24 AM #5 Newbie   Joined: Oct 2015 From: Uk Posts: 2 Thanks: 0 Yes 61 percent of 200. Everything is out of 200. I'm part of the 21 percent because I have 12 GCSE's. And I also make up a part of the 10 percent of a/a* because I have 7 of those. Last edited by skipjack; October 30th, 2015 at 10:51 AM.
 October 30th, 2015, 11:00 AM #6 Global Moderator   Joined: Dec 2006 Posts: 19,968 Thanks: 1850 The percentage you're asking for will be less than 21%, as you exceeded the minimum number of A*-C grades for that category.

 Tags curious, percentages, probabilities, results, school

 Thread Tools Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post jiasyuen Math 3 March 11th, 2015 10:47 PM jiasyuen Trigonometry 6 February 11th, 2015 04:53 PM RifkiNada Algebra 2 November 24th, 2012 04:32 AM sixflags11804 Complex Analysis 2 December 1st, 2008 04:43 PM

 Contact - Home - Forums - Cryptocurrency Forum - Top