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  • Question
  • How many parallelograms will be formed if 7 parallel horizontal lines intersect 6 parallel vertical lines?


  • Options
  • A. 215
  • B. 315
  • C. 415
  • D. 115

  • Correct Answer
  • 315 

    Explanation
    Parallelograms are formed when any two pairs of parallel lines (where each pair is not parallel to the other pair) intersect.
     

    Hence, the given problem can be considered as selecting pairs of lines from the given 2 sets of parallel lines.
     

    Therefore, the total number of parallelograms formed = 7C 2 x 6C 2 = 315
  • Tags: GRE, GATE, CAT, Bank Exams, AIEEE, Bank PO, Bank Clerk, Analyst

    More questions

    • 1. 
      ? 132 + 28 / 4 - (3)3 + 107 = (?) 2

    • Options
    • A. 2
    • B. 16
    • C. 256
    • D. 4
    • Discuss
    • 2. 
      A is thrice as good a workman as B and therefore is able to finish a job in 30 days less then B. How many days will they takes to finish the job working together?

    • Options
    • A. 101/4
    • B. 113/4
    • C. 111/4
    • D. 111/3
    • Discuss
    • 3. Solve the following:
      ? / .0025 = 800

    • Options
    • A. .2
    • B. .02
    • C. 2000
    • D. 2
    • Discuss
    • 4. 
      75% of 480 = (?) x 15?

    • Options
    • A. 32
    • B. 18
    • C. 360
    • D. None of these
    • Discuss
    • 5. 
      Ravi can row downstream at 9 km/h and upsteam at 5 km/h. Find the speed of Ravi in still water and speed of current.

    • Options
    • A. 7 km/h and 2 km/h
    • B. 8 km/h and 6 km/h
    • C. 7 km/h and 3 km/h
    • D. 8 km/h and 2 km/h
    • Discuss
    • 6. 56, 72, 90, 110, 132, 150

    • Options
    • A. 72
    • B. 110
    • C. 132
    • D. 150
    • Discuss
    • 7. 
      The true discount on Rs. 2,562 due 4 months hence is Rs. 122. The rate percent is?

    • Options
    • A. 12
    • B. 13
    • C. 15
    • D. 14
    • Discuss
    • 8. 
      Two pipes X and Y can fill a cistern in 6 and 7 min, respectively. Starting with pipe X, both the pipes are opened alternately, each for 1 min. In what time will they fill the cistern?

    • Options
    • A. 62/7 min
    • B. 63/7 min
    • C. 65/7 min
    • D. 61/7 min
    • Discuss
    • 9. 
      Inlet A is four times faster than inlet B to fill a tank. If A alone can fill it in 15 min, how long will it take if both the pipes are opened together?

    • Options
    • A. 10 min
    • B. 12 min
    • C. 15 min
    • D. 14 min
    • Discuss
    • 10. 
      In ? ABC, the median BE intersects AC at E, if BG = 6 cm, where G is the centro-id, then BE is equal to :

    • Options
    • A. 7 cm
    • B. 9 cm
    • C. 8 cm
    • D. 10 cm
    • Discuss


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