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    Question

    Eleven friends spent Rs. 19 each on a tour and the

    twelfth friend spent Rs. 11 less than the average expenditure of all twelve of them. What is the total money spent by them?
    A Rs. 290 Correct Answer Incorrect Answer
    B Rs. 216 Correct Answer Incorrect Answer
    C Rs. 278 Correct Answer Incorrect Answer
    D Rs. 270 Correct Answer Incorrect Answer

    Solution

    Average expenditure of 11 students = 19 × 11 = Rs. 209 Let money spent by the twelfth friend be Rs.x Total money spent by all the 12 friend = 209 + x Average money spent by 12 friend = (209 + x) / 12 Given, x = [(209 + x)/12] - 11 ⇒ 12x = 209 + x - 132 ⇒ 11x = 77 ∴ x = 7 Total expense = 209 + 7 = Rs. 216

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