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Bunuel
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Let the estate be 120 units. Each child receives equal parts and the same each equal part is received by 6 grand children as well.

Therefore, 120 is divided here into 6 parts for 20 units each.
Each child gets 20; each grandchild gets 20/6 units.

Now each grandchild's share= (20/6)/120 *100= 2.77~2.8%
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Each child will get an equal portion of the estate.

Call this portion:

1/X

Total amount allocated to 5 children:

5*1/X = 5/X

Each of the 6 grandchildren will receive an equal portion of the amount allocated to each child:

(1/X)/6 = 1/(6X)

Total amount allocated among 6 grandchildren:

6*1/(6X) = 1/X

The amounts allocated to the children and grandchildren must total 1:

5/X + 1/X = 6/X = 1, therefore:

X = 6

Since each grandchild will receive 1/(6X), their portions are:

1/(6*6) = 1/36 = 3/108 =

slightly less than 3%

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Deconstructing the Question

Mr. Evans has 5 children.
Each child receives an equal share of the estate.
The 6 grandchildren together receive a portion equal to the share of one child.

Step-by-step

Let total estate be E.

Children receive:

\(5 \text{ equal shares}\)

Grandchildren together receive:

\(1 \text{ share}\)

So the estate is divided into:

\(6 \text{ equal shares}\)

Each child receives:

\(\frac{E}{6}\)

Grandchildren together receive:

\(\frac{E}{6}\)

Each grandchild receives:

\(\frac{E}{6} \div 6 = \frac{E}{36}\)

Fraction of estate:

\(\frac{1}{36} \approx 0.0278\)

Convert to percent:

\(\approx 2.8\%\)

Answer: 2.8%
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