Question
A set ‘X’ includes four back-to-back even numbers,
and set ‘Y’ holds four successive odd numbers. The mean of the second elements from both sets is 38.5. Determine the total of the last numbers in both sets.Solution
ATQ,
Set X: {a, (a + 2), (a + 4), (a + 6)} Set Y: {b, (b + 2), (b + 4), (b + 6)} Now, (a + 2 + b + 2) ÷ 2 = 38.5 Or, a + b + 4 = 77 Or, a + b = 73 Required sum = a + 6 + b + 6 = 73 + 12 = 85
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