The average of n numbers is x. when 36 is subtracted from two of the numbers, the new average becomes (x-8).The value of n is:9465
Question
The average of n numbers is x. When 36 is subtracted from two of the numbers, the new average becomes (x-8). The value of n is: 9465
Solution
The problem can be solved using the formula for the average of a set of numbers, which is the sum of the numbers divided by the quantity of numbers.
Step 1: The sum of the original n numbers is nx (since the average is x).
Step 2: When 36 is subtracted from two of the numbers, the total sum of the numbers decreases by 72 (since 36*2=72).
Step 3: The new average is (x-8), so the new sum of the numbers is n(x-8).
Step 4: We can set up the equation nx - 72 = n(x-8) to find the value of n.
Step 5: Simplify the equation to nx - n(x-8) = 72.
Step 6: Distribute the n to get nx - nx + 8n = 72.
Step 7: Simplify to 8n = 72.
Step 8: Divide both sides by 8 to get n = 9.
So, the value of n is 9.
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