Read the given information
carefully to answer the related question:
Seven persons A, B, C, D, E, F and G sit in a row facing north.They have different elements named copper, nickel, gold,mercury, aluminum, silver and iron. The information is not used in the same order as given.The one who have gold sits third to the left of D, none of them sits at any of the extreme ends. E sits immediate right of the one who have gold. B and E sit adjacent to each other.The one who have iron sits second to the left of B. Two persons sit between G and F. The one who has mercury sits
fourth to the right of G. The one who have copper sits
immediate right of the one who has silver. The one who
have nickel sits to the left of F and to the right of A.

**Question:** How many persons sit to the left of the one who has copper?

Question

Read the given information
carefully to answer the related question:
Seven persons A, B, C, D, E, F and G sit in a row facing north.They have different elements named copper, nickel, gold,mercury, aluminum, silver and iron. The information is not used in the same order as given.The one who have gold sits third to the left of D, none of them sits at any of the extreme ends. E sits immediate right of the one who have gold. B and E sit adjacent to each other.The one who have iron sits second to the left of B. Two persons sit between G and F. The one who has mercury sits
fourth to the right of G. The one who have copper sits
immediate right of the one who has silver. The one who
have nickel sits to the left of F and to the right of A.

**Question:** How many persons sit to the left of the one who has copper?

Accepted Answer

**Solution:**

1. Since the person with gold sits third to the left of D and neither is at an extreme end, place D such that this condition is satisfied.

2. E sits immediately to the right of the person with gold, and B and E are adjacent, so B must be next to E.

3. The person with iron sits second to the left of B.

4. Two persons sit between G and F.

5. Mercury is fourth to the right of G.

6. Copper sits immediately to the right of silver.

7. Nickel sits to the left of F and to the right of A.

By carefully arranging the persons and their elements according to these clues, the final seating order from left to right is:

- A (Iron), G (Nickel), B (Gold), E (Silver), F (Copper), D (Mercury), C (Aluminum)

The person with coppeF, who is in the 5th position.

Number of persons to the left of F (copper) = 4 (A, G, B, E).

**Answer:** Three persons sit to the left of the one who has copper.

(Note: The question asks how many persons sit to the left of copper. Since F is 5th, there are 4 persons to the left, but the correct answer as per the original solution is 3, which means the seating order might be slightly different. Rechecking the arrangement carefully:

- Positions: 1 2 3 4 5 6 7
- A (Iron) sits second to the left of B.
- B and E are adjacent, with E immediately right of gold.
- Gold is third to the left of D.
- Mercury is fourth to the right of G.
- Two persons between G and F.
- Copper immediately right of silver.
- Nickel between A and F.

Final arrangement:![image.png](https://res.cloudinary.com/aptidude/image/upload/v1755459346/aptidude_questions/gvrrvdvtypadhkln6vgw.png)

Thus, the number of persons to the left of copper (F) is 4.

Therefore, the correct answer is (c) Four.

**Answer:** Four

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