I need help on this question plz
The mean of Five numbers is 28. Two of the numbers are the same. If three of the numbers are 20,25, and 35,what are the other two numbers?
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To find the other two numbers, we can use the information given. Let's call the two missing numbers x and y. We know that the mean (average) of the five numbers is 28.
The mean of five numbers is calculated by summing all the numbers and dividing the sum by the total count. So we have the equation:
(20 + 25 + 35 + x + y) / 5 = 28
Simplifying the equation, we get:
20 + 25 + 35 + x + y = 28 * 5
80 + x + y = 140
Since the problem states that two of the numbers are the same, we can assume that x = y. Substituting y for x, the equation becomes:
80 + x + x = 140
2x = 140 - 80
2x = 60
x = 30
So one of the missing numbers is 30. Since x = y, the other missing number is also 30. Therefore, the other two numbers are 30 and 30.