問maths 超趕~
2007-08-21 7:40 pm
Q2. In a multiple-choice test, there are 24 quertions. For each quertion, 4 marks are given for acorrect answer, 3 marks are deducted for an incorrect answer and 2 marks are deducted for no answer. John attempts 18 questions, and only answers 9 questions correctly. Find his final score.
回答 (6)
2007-08-21 8:02 pm
✔ 最佳答案
i guess the followingtotal score for the test = 24 x 4 =96
total marks deducted= 3x9+6x2= 39
his final score = 96-39= 57
hope i can help
參考: me
2007-08-21 7:54 pm
no answer : (24-18)=6 X2= deduct 12marks
wrong answer : (18-9)X3marks = deduct 27marks
total deduct : 39marks
correct marks is : 9X4 = 36marks
final score : 36-39 marks =-3
wrong answer : (18-9)X3marks = deduct 27marks
total deduct : 39marks
correct marks is : 9X4 = 36marks
final score : 36-39 marks =-3
2007-08-21 7:50 pm
score: 0 (based on the sitaution that there is no negative final score)
his score is as below:
score of correct answer - score of incorrect answer - score of no answer
= 9X4 - (18-9)X3 - (24-18)X2
=36 - 27 - 12
= -3
his score is as below:
score of correct answer - score of incorrect answer - score of no answer
= 9X4 - (18-9)X3 - (24-18)X2
=36 - 27 - 12
= -3
2007-08-21 7:49 pm
John attempts 18 questions -----佢答左18條
only answers 9 questions correctly -----答對9條(錯9條)
24 - 18 = 6條冇答
所以 his final score
=9*4 - 9*3 - 6*2
= - 3 = 0 mark
only answers 9 questions correctly -----答對9條(錯9條)
24 - 18 = 6條冇答
所以 his final score
=9*4 - 9*3 - 6*2
= - 3 = 0 mark
參考: ME
2007-08-21 7:46 pm
correct : 9 = + 36
incorrect : 9 = -27
no answer : (24-18) = 6 = -12
final : -3
incorrect : 9 = -27
no answer : (24-18) = 6 = -12
final : -3
收錄日期: 2021-04-13 13:01:52
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