Class 9 Maths I Revision Worksheet Question 1
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Questions and Answers

Which of the following is not considered primary data?

  • Reviewing the cleanliness status of canals by reviewing documents (correct)
  • Gathering information about student attendance by visiting a class
  • Collecting information about soybean plantation from the village Talathi
  • Conducting a survey by visiting homes to find the number of family members
  • If the equations $3x + 5y = 9$ and $5x + 3y = 7$ are given, what is the value of $x + y$?

  • 16
  • 7
  • 2 (correct)
  • 10
  • What is the mean proportional of 4 and 25?

  • 9
  • 8 (correct)
  • 6
  • 12
  • What is the ratio of 1 kg to 2500 grams?

    <p>1:2500</p> Signup and view all the answers

    What is the class mark of the class interval 30-40?

    <p>35</p> Signup and view all the answers

    If the cost of 8 books and 5 pens is Rs 420, what is the mathematical form of this statement using variables 'x' for books and 'y' for pens?

    <p>$8x + 4y = 420$</p> Signup and view all the answers

    In a 'tree plantation' project, Harit Sena students planted the following number of trees each: 3, 5, 4, 3, 5, 4, 3, 5, 4, 5, 3, 5, 4, 3, 5, 5, 3, 4, 4, 3, 5, 4, 3, 5, 4, 5, 5, 4, 3, 5. What is the mean of the number of trees planted by each student?

    <p>4.1</p> Signup and view all the answers

    A hockey player scored the following goals in 9 matches: 5, 4, 0, 2, 5, 2, 2, 4, 4. What is the mode of the number of goals scored?

    <p>4</p> Signup and view all the answers

    If a hockey player scored a total of 29 goals in 9 matches, what is the median number of goals scored per match?

    <p>4</p> Signup and view all the answers

    If Raj saves 180 rupees monthly and spends 90% of his monthly income, how much does he earn monthly?

    <p>2500 rupees</p> Signup and view all the answers

    Sanjay's monthly salary increased from Rs.4500 to Rs.5400 over a period of 10 years with yearly increments. If his original salary was Rs.X and yearly increment was Rs.Y, what are X and Y?

    <p>(X=4000, Y=100)</p> Signup and view all the answers

    Solve the simultaneous equations provided: $2x + y = -2$ and $3x - y = 7$. What is the value of x?

    <p>-1</p> Signup and view all the answers

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