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In a row of forty boys facing North, R is twelfth from the left end and T is eighteenth from the right end. How many boys are between R and T in the row?
  • a)
    10
  • b)
    11
  • c)
    12
  • d)
    Cannot be determined
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
In a row of forty boys facing North, R is twelfth from the left end an...
R = 12th from left
T = 18th from right
No. of boys between R and T = 40 - (12+18) = 10
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Most Upvoted Answer
In a row of forty boys facing North, R is twelfth from the left end an...
To find the number of boys between R and T in the row, we need to determine the number of boys to the left of R and the number of boys to the right of T.

Given information:
- R is twelfth from the left end, which means there are 11 boys to the left of R.
- T is eighteenth from the right end, which means there are 17 boys to the right of T.

Calculating the number of boys between R and T:
To find the number of boys between R and T, we need to subtract the number of boys to the left of R and the number of boys to the right of T from the total number of boys in the row.

Total number of boys in the row = 40
Number of boys to the left of R = 11
Number of boys to the right of T = 17

Number of boys between R and T = Total number of boys - Number of boys to the left of R - Number of boys to the right of T
Number of boys between R and T = 40 - 11 - 17
Number of boys between R and T = 12

Therefore, there are 12 boys between R and T in the row.

Hence, the correct answer is option A) 10.
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