Question

    A list contains ten numbers. The average of the initial

    three values is 14, and the last five numbers have an average of 23. If the middle two numbers (4th and 5th) have an average of 16, determine the average of all ten numbers.
    A 18.9 Correct Answer Incorrect Answer
    B 21.5 Correct Answer Incorrect Answer
    C 19.1 Correct Answer Incorrect Answer
    D 33.5 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Average of all the 10 numbers = {(3 × 14) + (5 × 23) + (2 × 16)/10}

    = {(42 + 115 + 32)/10} = 189/10 = 18.9

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