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Student are sitting in a row in which the position of X is 17th from the left and that of Y is 14th from the right. If they interchange their positions, X’s position becomes 7th from the left. How many students are there in the row?
  • a)
    20
  • b)
    19
  • c)
    21
  • d)
    22
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Student are sitting in a row in which the position of X is 17thfrom th...
Draw X and Y’s position in straight line,

Now they interchange their position and X becomes 7th from left end.

Now we can see X is 7th from left end and 14th from right end.
So, total boys in this row = 7 + 14 – 1 = 20.
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Most Upvoted Answer
Student are sitting in a row in which the position of X is 17thfrom th...
If X is the 17th student from the left and Y is the 14th student from the right, then there are a total of 17 + 14 - 1 = 30 students in the row.

When they interchange their positions, X will be the 14th student from the right and Y will be the 17th student from the left.
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Community Answer
Student are sitting in a row in which the position of X is 17thfrom th...
14+7-1=20
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Student are sitting in a row in which the position of X is 17thfrom the left and that of Y is 14thfrom the right. If they interchange their positions, X’s position becomes 7thfrom the left. How many students are there in the row?a)20b)19c)21d)22Correct answer is option 'A'. Can you explain this answer?
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