Multiple Choice Questions on There were 35 students in a hostel Due to the admission of 7 new students the expenses of the n........... for Graduation cum Career Security Preparation

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Multiple Choice Questions

There were 35 students in a hostel Due to the admission of 7 new students the expenses of the n...........

Quantitative Aptitude (CCS) Average
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    There were 35 students in a hostel. Due to the admission of 7 new students the expenses of  the  mess  were  increased  by  Rs.42  per  day  while  the  average  expenditure  per  head diminished by Re 1. What was the original expenditure of the mess?

    Rs.450

    Incorrect Answer

    Rs.420

    Correct Answer

    Rs.340

    Incorrect Answer

    Rs.480

    Incorrect Answer
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    Explanation:

    Let the original average expenditure be Rs.x then,
    42(x−1)−35x=42
    ⇒7x=84
    ⇒x=12
    Therefore original expenditure
    =Rs.(35×12)
    =Rs. 420

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