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oh wow, thanks for the quick response!
@timo86m :can u explain how did u get that ?
im studying for the SATs and am struggling greatly with permutations
@Megichu : U know A.Sequence basics ?
2+2+2+2...=19*2 =38 25+(19*25)+38
i understand what the basic formula is, but interpreting the problem at times can be difficult
Front row=a=first term=25. Each of the other rows has two more seats than the row in front of it ,thats mean that the difference between every two rows is 2 ,So d=2 ========================= a=25 ,d=2 Sum law : Sn=n/2[2a+(n-1)d] where n = number of terms .. now lets fill up the rule S20=20/2 [2*25+(20-1)2]=880 seats . ------------------------------------------------------------- Make sense ?
perfect. thank you so much for the great response! and yes, that makes much more sense
Great,Inform me when you need help :)
not sure why i have such a difficult time with these problems (considering that their are 2 main formulas XD) but i really appreciate the help
also, this site is great. i look forward to using it more often!
Just keep solving examples ,Then it will get much easier :)
definitely doing a lot of that right now! haha im taking an SAT course right now and have a packet to practice all of these lovely problems :3