Question

There are 25 questions in a quiz.

Every correct answer scores 3 points.

Each incorrect answer loses 2 points.

A question not answered scores 0 points .

It is possible to finish the quiz with a negative score.

Another student answers 21 questions. 6 are correct. How many points does she score?

This is a mathswatch question please help quickly

Answer 1

Step-by-step explanation:

6 are correct questions= 6*3=18 points

(21-6) incorrect questions=15★(-2)=-30

for every untouch questions 0 points

Total points he obtained=(-30++18)= -12 points

Therefore It is possible to finish the quiz with a negative score.

Answer 2

Answer:

Number of questions= 25

Correct answers= x and score= 3

Incorrect answers= y and score= -2

Not answered= z and score= 0

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We can calculate the score as:

• x+y+z=25
• Score= 3x-2y

The score can get negative result when 3x<2y or x<2y/3

It is possible, for example, when x=5 and y=8

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Another student answers 21 questions. 6 are correct. How many points does she score?

6*3-(21-6)*2+4*0= 18-30= - 12 points