Advertisements
Advertisements
प्रश्न
In a class test (+3) marks are given for every correct answer and (–2) marks are given for every incorrect answer and no marks for not attempting any question. Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly?
Advertisements
उत्तर
Marks scored for 1 correct answer = +3
Marks scored for 1 incorrect answer = −2
Marks scored by Radhika = 20
Marks scored for 12 correct answers = 12 × 3 = 36
Marks scored for incorrect answers = Total marks scored − Marks scored for 12 correct answers
= 20 − 36
= −16
Marks scored for 1 incorrect answer = −2
Thus, number of incorrect answers = (−16) ÷ (−2)
= 8
Therefore, she attempted 8 questions incorrectly.
APPEARS IN
संबंधित प्रश्न
(–206) ÷ _____ = 1
– 87 ÷ _____ = 87
The temperature at 12 noon was 10°C above zero. If it decreases at the rate of 2°C per hour until midnight, at what time would the temperature be 8°C below zero? What would be the temperature at midnight?
(−400) divided into 10 equal parts gives _____
Which of the following does not represent an integer?
The value of 5 ÷ (–1) does not lie between ______.
Encircle the odd one of the following.
______ ÷ (–1) = –83
(–95) ÷ ______ = 95
a ÷ b = b ÷ a
