Question

in a computerised test of 50 question, for each correct answer 1 mark is awarded, and for each wrong answer, 0.25
marks are deducted, if a student answer the first 35 question correctly, how many more question from the reaming 15 should he answer correctly to score 80% given that he attempted all questions?


a. 5
b. 7
c. 8
d. 9​

Answer 1

Answer:

head do bhi CO CO CO CO CO go is ek of FL CO GB ICC FL HD so ka FL is to in hi hai hum

Answer 2

Answer:

Ans (b)  7

Step-by-step explanation:

Total marks=50*1=50

80% of 50=50*80/100=40

he receives 35 marks from first 35 question

Now suppose from 15 questions he make x question correctly and

15-x are wrong

total marks=x-(15-x)0.25=5

Multiply by 4

4x-15+x=20

5x=35

x=35/5=7

Ans (b)  7