Question
In a competitive examination containing 100
questions, 1 mark is awarded for every correct answer and ½ mark gets deducted for every wrong answer. If a student attempted all questions and obtained 79 marks, how many wrong answers must he have given?Solution
Let number of questions with right answers = x ∴ No. of questions with wrong answers = 100 – x ∴ Marks obtained for right answers = x ∴ Marks deducted for wrong answers = (100 - x)/ 2 ∴ x - (100 - x) / 2 = 79 ⇒ 2x - 100 + x/ 2 = 79 ⇒ 3x - 100 = 158 ⇒ 3x = 258 ∴ x = 86 ∴ No. of questions with wrong answers (100 – 86) = 14
Which of the following is not a data structure?
. What is Internet television (or online television)?
Which of the following program runs in parts on several computers?
Which of the following is a semiconductor memory?
Which of the following components is responsible for temporarily storing data and instructions directly accessible to the CPU?
Which is called brain of computer?
_______________ is used in second generation computer.
Which Function key is commonly used to access the boot menu during computer startup to select a boot device, like a USB drive or CD/DVD?
Margin that is added to the binding side of the page when printing?
What is a DDoS (Distributed Denial of Service) attack in networking?
Relevant for Exams:
