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In a row of girls, Swati is twelfth from the left and Neetu is twentieth from the right. If they interchange their positions, then Swati becomes sixteenth from the left. Then what position will Neetu be from right?
  • a)
    25
  • b)
    27
  • c)
    26
  • d)
    24
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In a row of girls, Swati is twelfth from the left and Neetu is twenti...
Swati = 12th position from left
Neetu = 20th
Position from right
After interchange
Swati = 16th position from left
Neetu = ? position from right
total number of girls = Swati from the left after interchange + Neetu from the right before interchange – 1
= 16 + 20 – 1
= 36 – 1
total number of girls = 35
total number of girls = Swati from the left before interchange + Neetu from the right after interchange – 1
35 = 12 + ? – 1
35 = 11 + ?
? = 35 – 11
? = 24
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Most Upvoted Answer
In a row of girls, Swati is twelfth from the left and Neetu is twenti...
Given Information:

- Swati is twelfth from the left.
- Neetu is twentieth from the right.
- After they interchange positions, Swati becomes sixteenth from the left.
Calculations:

- Initially, the total number of girls in the row = 12 (Swati's position) + 20 (Neetu's position) - 1 = 31.
- After swapping positions, Swati becomes the 16th from the left, which means Neetu will be at the 16th position from the right.
- Therefore, Neetu's new position = Total number of girls in the row - Swati's new position + 1 = 31 - 16 + 1 = 16.
Conclusion:

Neetu will be in the 16th position from the right after they interchange their positions. Since Neetu was originally at the 20th position from the right, she will move 4 positions to the left, making her the 24th position from the right. So, the correct answer is option 'd) 24'.
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Passage 2Newtons surprising success at developing the laws of motion, as well as the development and refinement of other physical laws, led to the idea of scientific determinism. The first expression of this principle was in the beginning of the nineteenth century by Laplace, a French scientist. Laplace argued that if one knew the position and velocity of all the particles in the universe at a given time, the laws of physics would be able to predict the future state ofthe universe.Scientific determinism held sway over a great many scientists until the early twentieth century, when the quantum mechanics revolution occurred. Quantum mechanics introduced the world to the idea of the uncertainty principle, which stated that it was impossible to accurately measure both the position and the velocity of a particle at one time. Because Laplaces omniscience could never occur, even in theory, the principle of scientific determinism was thrown into doubt. However, quantum mechanics does allow for a reduced form of scientific determinism. Even though physicists are unable to know precisely where a particle is and what its velocity is, they can determine certain probabilities about its position and velocity. These probabilities are called wave functions. By use of a formula known as the Schrodinger equation, a scientist with the wave function of a particle at a given time can calculate the particles future wave function. These calculations can give the particles position or velocity, but not both. Thus, the physicist is in possession of exactly half ofthe information needed to satisfy Laplaces view ofdeterminism. Unfortunately, under modern physics theories, that is far as any researcher can go in predicting the future.Q. Which of the following, if true, would most strengthen the authors conclusion in the passages final sentence?

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In a row of girls, Swati is twelfth from the left and Neetu is twentieth from the right. If they interchange their positions, then Swati becomes sixteenth from the left. Then what position will Neetu be from right?a)25b)27c)26d)24Correct answer is option 'D'. Can you explain this answer?
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