easy
Q5 In a class test containing 20 questions, 4 marks are given for every correct
answer and (-2) marks are given for every incorrect answer. Hazel attempts
all questions and 12 of her answers are correct. What is her total score?
Q6 A certain freezing process requires that room temperature be lowered from
400C at the rate of 50
c per hour. What will be the room temperature 12 hours
after the process begins?
Q7 The sum of two integers is 153. If one of them is -97, find the other
integer.
Q8 A shopkeeper gains Rs1 on each pen and loses 40 paise on each pencil.
He sells 45 pens and some pencils losing Rs5 in all. How many pencils does
he sell?
Q9 An elevator descends into a mine shaft at the rate of 8 metre per min. If
the descent starts from 16m above the ground level, how long will it take to
reach -240m
Answers
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Step-by-step explanation:
Q5) The no. of marks awarded for every correct answer=4
The no. of marks awarded for every wrong answer= -4
Hazel got 12 correct answers and 8 wrong answers.
Correct answer=12×4=48
Wrong answer=8×(–2)= –(8×2)=–16
Total score of Hazel=48–16=32
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