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. A student answers 15 questions 10 are correct how many points did he score ?. .......
Answers
No of questions = 25
Each correct answer = +3
Each incorrect answer = +2
Not answered = 0
If the number of incorrect answer is more than the number of correct answers, it is possible to get a negative score.
Student answers 15 questions.
That means he didn't answer 10 questions.
In 15 questions, 10 questions are correct.
Points for 10 questions = 10 x 3 = 30
He got 5 questions wrong.
So points for wrong questions = 5 x (-2) = -10
His total score = 30 - 10 = 20
Max. Marks = 25 x 3 = 75.
Answer:
When a match is struck, friction heats the head to a temperature at which the chemicals react and generate more heat than can escape into the air, and they burn with a flame. If a wind blows away the heat or the chemicals are moist and friction does not raise the temperature sufficiently, the match goes out.