2. Questions Bank
  3. 7th Class
  4. Mathematics
  5. Algebraic Expressions

7th Class Mathematics Algebraic Expressions Question Bank Algebraic Expressions

  • question_answer
    In a school, \[8{{a}^{2}}+4a+9\]students were enrolled. \[2{{a}^{2}}-9a+2\]students were boys. How many girls were enrolled?

    A)  \[6{{a}^{2}}-13a+7\]

    B)  \[4{{a}^{2}}+13a+7\]

    C)  \[6{{a}^{2}}+13a+7\]

    D)  \[4{{a}^{2}}-13a+7\]

    Correct Answer: C

    Solution :

    Number of girls enrolled \[=(8{{a}^{2}}+4a+9)-(2{{a}^{2}}-9a+2)\] \[=8{{a}^{2}}+4a+9-2{{a}^{2}}+9a-2=6{{a}^{2}}+13a+7\]


You need to login to perform this action.
You will be redirected in 3 sec spinner