Question

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

Answer 1

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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