If the mean of the data set 1, 2, 3, x, 5, 6, y is 5, then which of the following is correct?
x + y = 11
y = 18 + x
x = 18 – y
x – y = 11
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Answer:
Hey mate! Here's your answer:
x = 18 - y (Option C).
Step-by-step explanation:
The mean of 1, 2, 3, x, 5, 6, y is 5.
So this means there are 7 numbers whose mean is 5.
So basically, their sum is 5 * 7 = 35.
So 1 + 2 + 3 + x + 5 + 6 + y = 35.
17 + x + y + 35
x + y = 18 OR x = 18 - y.
So Option C is your answer.
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