tag:blogger.com,1999:blog-8682935679303899788.post4516871483852341912..comments2023-08-22T23:40:37.672+08:00Comments on Budak Timur: number gameLeng Chaihttp://www.blogger.com/profile/05829626028118734239noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-8682935679303899788.post-81547363267577466192012-12-20T23:22:28.968+08:002012-12-20T23:22:28.968+08:00so here's the answer for this q.
let a be the ...so here's the answer for this q.<br />let a be the no. of right answer while b is the no. of wrong answer.<br />let x be the marks you get when answering right question and y marks you get when answering wrong question.<br /><br />so from here we have <br />a + b = 50<br />ax + by = marks, 17x + 33y = o.5 (1% out of 50 is 0.5)<br />if the student get all the question right he surely get 100% so 50x = 50 which means x is 1<br /><br />so y = (0.5-17)/33 = -0.5<br /><br />in order to pass the exam which is getting 50% the least, a - 0.5(50-a) =/> 25<br />a =/> 33.333. so the students need to get at least 34 questions right in order to pass the test given that the student answers all 50 questions.Leng Chaihttps://www.blogger.com/profile/05829626028118734239noreply@blogger.com