Question

The mean of 8 numbers is 35 if a number is excluded then the mean is reduced to 3 find a good number

Answer 1

I hope it will help you

Answer 2

The good number is 56.

Step-by-step explanation:

Since we have given that

Mean of 8 numbers = 35

So, sum of 8 numbers would be

$\dfrac{\sum x}{8}=35\\\\\sum x=35\times 8\\\\\sum x=280$

Let the number be 'x'.

According to question, we get that

$\dfrac{280-x}{7}=35-3\\\\\dfrac{280-x}{7}=32\\\\280-x=32\times 7=224\\\\280-224=x\\\\56=x$

Hence, the good number is 56.

# learn more:

The mean of 8 numbers is 35 if a number is in excluded then the mean is reduced by 3 find the excluded number

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