a mathematics

Question

question contained 20
items. every wrong answer
scores -2marks, every
correct answer scores
4marks and no mark for no
answer. (a) find the minimum possible score (b) Tembo had 10 correct answers, 8 wrong answers and 2 no answers. What was his mark? (c) Bwalya scored 14 marks having got 5 answers wrong (i) how many answers did he get correct? (ii) how many questions did he not attempt?

Answer 1

(a) clearly, 20 * -2
(b) 10*4 - 8*2 + 2*0
(c) 4*c - 5*2 = 14
(d) 20-(c+5) using the value for c above

Answer 2

a. 40

sol.
20 x 4 = 80 (max)
20 x 2 = 40
80 – 40 = 40 (min)

b. 2 marks

sol.
10 (correct answers) x 4 (marks given to every correct answer) = 40
8 (wrong answers) x 2 (marks deducted to every wrong answer) = 16
40 (marks by correct answer) – 16 (marks that will be deducted) = 2

c. 24

sol.
14 (marks) + [(5, wrong answers) (2, marks deducted for every wrong answer)]
14 + 10 = 24

I. 6

sol.
14 (marks) + [(5, wrong answers) (2, marks deducted for every wrong answer)]
14 + 10 = 24
24 (supposed to be total mark) / 4 (marks given for every correct answer) = 6

II. 14

80 (max mark) – 24 (mark of Bwalya) = 56
56 / 4 (mark given to every correct answer) = 14

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Please correct me if I'm wrong thanks xx