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Select the correct answerIn a row of 21 girls, when Monika was shifted by four places towards the right, she became 12th from the left end. What was her earlier position from the right end of the row?Options10th9thNone11th12th

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Select the correct answerIn a row of 21 girls, when Monika was shifted by four places towards the right, she became 12th from the left end. What was her earlier position from the right end of the row?Options10th9thNone11th12th

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Solution 1

Sure, let's solve this step by step:

  1. After Monika was shifted four places to the right, she became 12th from the left end. This means that before she was shifted, she was 12 - 4 = 8th from the left end.

  2. In a row of 21 girls, if Monika was 8th from the left end, then she was 21 - 8 + 1 = 14th from the right end.

So, Monika's earlier position from the right end of the row was 14th. However, this option is not given in the list. Therefore, the correct answer is 'None'.

This problem has been solved

Solution 2

Para resolver esta pregunta, sigamos los siguientes pasos:

  1. Determinar la nueva posición de Monika desde el extremo izquierdo:

    • Monika se convierte en la 12ª desde el extremo izquierdo después de ser movida 4 lugares hacia la derecha.
  2. Calcular la posición original de Monika desde el extremo izquierdo:

    • Si Monika se movió 4 lugares hacia la derecha para llegar a la 12ª posición, su posición original desde el extremo izquierdo era 12 - 4 = 8.
  3. Calcular la posición original de Monika desde el extremo derecho:

    • En una fila de 21 chicas, la posición desde el extremo derecho se puede calcular restando la posición desde el extremo izquierdo de 22 (ya que hay 21 chicas en total y estamos contando desde el otro extremo).
    • Entonces, la posición original de Monika desde el extremo derecho es 22 - 8 = 14.
  4. Verificar las opciones dadas:

    • Las opciones son: 10th, 9th, None, 11th, 12th.
    • Ninguna de las opciones coincide con 14.

Por lo tanto, la respuesta correcta es: None.

This problem has been solved

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