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Question

Study the given table and answer the question that follows.
The information related to the sale (in rupees) of different items of a baker's shop in one day is given in the table.
ItemsOrdinary breadFruit breadCakes and pastriesBiscuitsOthers
Sales (in rupees)400320210120100
Customers401614124

What would be the maximum amount of increase in sales for the baker, if all customers who bought any type of bread would ALSO have bought either Cakes and Pastries OR biscuits?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
840

Calculating Maximum Sales Increase

The goal is to find the maximum potential increase in sales if customers who bought bread also purchased either cakes and pastries or biscuits.

Identify Bread Customers

First, determine the total number of customers who purchased any type of bread:

  • Customers buying Ordinary bread: 40
  • Customers buying Fruit bread: 16
  • Total bread customers = 40 + 16 = 56

Calculate Potential Increase Scenarios

Now, calculate the potential sales increase if these 56 bread customers additionally bought either cakes and pastries or biscuits. We need to find the average sales per customer for these items.

  • Cakes and Pastries:
    • Sales: ₹210
    • Customers: 14
    • Average sale per customer = $ \frac{210}{14} = 15 $ rupees
    • Potential increase = $ 56 \times 15 = 840 $ rupees
  • Biscuits:
    • Sales: ₹120
    • Customers: 12
    • Average sale per customer = $ \frac{120}{12} = 10 $ rupees
    • Potential increase = $ 56 \times 10 = 560 $ rupees

Determine Maximum Increase

The question asks for the maximum possible increase. Compare the potential increases from the two scenarios:

  • Maximum increase = $ \max(840 \text{ rupees}, 560 \text{ rupees}) $
  • Maximum increase = 840 rupees

Therefore, the maximum amount of increase in sales would be ₹840.

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