The average of 9 numbers is 30.If the average of first '5' numbers is 25 and that of the last '3' number is 35.Then the 6th number?30405060
Question
The average of 9 numbers is 30.If the average of first '5' numbers is 25 and that of the last '3' number is 35.Then the 6th number?30405060
Solution
To find the 6th number, we can follow these steps:
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The total sum of all 9 numbers is 30 * 9 = 270 (since the average is the total sum divided by the number of items)
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The total sum of the first 5 numbers is 25 * 5 = 125 (since the average of these 5 numbers is 25)
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The total sum of the last 3 numbers is 35 * 3 = 105 (since the average of these 3 numbers is 35)
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Now, if we subtract the sum of the first 5 numbers and the last 3 numbers from the total sum of all 9 numbers, we will get the 6th number. So, the 6th number is 270 - 125 - 105 = 40.
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