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Question

A question is given, followed by two statements labelled I and II. Identify which of the statements is/are sufficient/necessary to answer the question.

Question:
What will be the total price of 10 chairs, each of which is of the same price?

Statements:
I. One-fourth of the price of each chair is ₹140.
II. The total price of 3 chairs is ₹560 more than the total price of 2 chairs.

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
Either Statement I or Statement II is sufficient

The main question asks for the total price of 10 chairs, given that all chairs have the same price. We need to determine if the provided statements are sufficient to find this total price.

Statement I Sufficiency Analysis

Statement I says: "One-fourth of the price of each chair is ₹140."

Let the price of one chair be denoted by $P$. The statement can be written as:

$ \frac{1}{4} \times P = 140 $

To find the price of one chair ($P$), we multiply both sides by 4:

$ P = 140 \times 4 = 560 $

So, the price of one chair is ₹560.

The total price of 10 chairs is:

$ \text{Total Price} = 10 \times P = 10 \times 560 = 5600 $

Therefore, Statement I alone is sufficient to answer the question.

Statement II Sufficiency Analysis

Statement II says: "The total price of 3 chairs is ₹560 more than the total price of 2 chairs."

Let the price of one chair be $P$. The statement can be written as:

$ (3 \times P) = (2 \times P) + 560 $

To find the price of one chair ($P$), we rearrange the equation:

$ 3P - 2P = 560 $

$ P = 560 $

So, the price of one chair is ₹560.

The total price of 10 chairs is:

$ \text{Total Price} = 10 \times P = 10 \times 560 = 5600 $

Therefore, Statement II alone is sufficient to answer the question.

Conclusion on Sufficiency

Since both Statement I and Statement II independently provide enough information to calculate the price of one chair and subsequently the total price of 10 chairs, either statement is sufficient.

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Important Questions from Data Sufficiency

  1. Which of the following statement is correct?

    I. The value of 1002 - 992 + 98972 + 962 - 952 + 942  - 932  + ......  + 222   - 212 is 4840.

    II. The value of 

    \(\left(k^2+ \frac{1}{k^2} \right) \left(k- \frac{1}{k} \right) \left(k^4+ \frac{1}{k^4} \right) \) \(\left(k+ \frac{1}{k} \right)\left(k^4- \frac{1}{k^4} \right)\) is \(k^{16}- \frac{1}{k^{16}}\).

  2. Given below is a question followed by two statements I and II. Read both statements carefully to decide which one of them is sufficient to answer the question.

    Six people - A, B, C, D, E and F are sitting in a straight line facing north. Who sits to the immediate left of D?

    (I) A sits second from one of the extreme ends of the line. Only two people sit between A and B. E sits to the immediate right of C.

    (II) C sits third from the left end of the line. Only one person sits between C and F. E sits third to the right of F.

  3. Please read the below equation and select an appropriate option from the following.

    x + y = 10 ; y = x - 2

    Quantity A is x.

    Quantity B is y.

  4. A lady wants to buy the following items in the given price range-

    1. Tomato between Rs. 40 and Rs. 45 per kg.

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    D. Shop P sells tomato at Rs. 23.5 per half kg, grapes at Rs. 85 per kg and milk at Rs. 23 per litre.
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