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  • Question

  • The mean of marks secured by 30 students in division-A of class X is 67, 55 students of division-B is 63 and that of 40 students of division-C is 61. What is the mean of marks of the students of three divisions of Class X?


  • Options
  • A. 63.32
  • B. 62.62
  • C. 61.92
  • D. 64.72

  • Correct Answer
  • 63.32 

    • More questions

    • 1. Ganesh invested an amount of Rs x in a fixed deposit scheme offering 5% per annum for 1st year and 15% per annum for 2nd year and received an amount of Rs 9660 after two years. What is the value of x (in Rs)?

    • Options
    • A. 9000
    • B. 8000
    • C. 8500
    • D. 8200
      • Discuss
    • 2. If 2x + 6y = 3xy and 10x - 3y = 4xy, find x, y.

    • Options
    • A. 3, 2
    • B. 2, 3
    • C. 4, 6
    • D. 6, 4
      • Discuss
    • 3. An amount fetched a total simple interest of Rs. 3200 at the rate of 6.25 %/yr in 4 years. What is the amount (in Rs)?

    • Options
    • A. 13800
    • B. 11800
    • C. 12800
    • D. 14800
      • Discuss
    • 4. If 2x- 3(4-2x) < 4x - 5 < 4x + 2x/3, then x can take which of the following values?

    • Options
    • A. 2
    • B. 8
    • C. 0
    • D. -8
      • Discuss
    • 5. The simple and compound interest that can be earned in two years at the same rate is Rs 1500 and Rs 1575 respectively. What is the rate (% per annum) of interest?

    • Options
    • A. 8
    • B. 10
    • C. 12
    • D. 5
      • Discuss
    • 6. If 1/(tanA + cotA) = x, then value of x is

    • Options
    • A. cosAsinA
    • B. cos2Asin2A
    • C. cosecAsecA
    • D. cosec2Asec2A
      • Discuss
    • 7. The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is Rs. 1. The sum (in Rs.) is:

    • Options
    • A. 620
    • B. 630
    • C. 640
    • D. 625
      • Discuss
    • 8. P(4,2) and R(-2,0) are vertices of a rhombus PQRS. What is the equation of diagonal QS.

    • Options
    • A. x - 3y = -2
    • B. 3x + y = 4
    • C. 3x + y = -4
    • D. x - 3y = 2
      • Discuss
    • 9. The sum of money that will yield Rs. 60 as simple interest at 6% per annum in 5 years is

    • Options
    • A. 200
    • B. 225
    • C. 175
    • D. 300
      • Discuss
    • 10. If a ? b = 11 and ab = 24, then value of a2 + b2 is

    • Options
    • A. 169
    • B. 37
    • C. 73
    • D. 48
      • Discuss

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