A) Rs 1 | B) Rs 1.33 |

C) Rs 1.5 | D) Rs 1.6 |

Explanation:

Recall it is based on inverse proportion or product constancy concept.

Reducion in price increase in amount

25% 33.33% = 4 oranges

It means original number of oranges = 4 x 3 = 12

original price of oranges = = Rs. 1.33

A) 18% | B) 20% |

C) 22% | D) 24% |

Explanation:

Let the Cost of Production of the article = 100

Then, Labour Cost = 20

Raw Material = 10

Other Expenditure = 100 - 10 – 20 = 70

Selling Price of the article = 120

After increasing Labour and Raw material cost by 40% & 20% respectively,

New Labour cost = 28

New Raw material cost = 12

New Cost of Production = 70 + 28 + 12 = 110

Then, New SP = 110% of 120 = 120 x 110/100 = 132

=> New Gain = 132 - 110 = 22

=> New Profit % = 22 x 100/110 = 20%

A) 8 : 62.5 | B) 55 : 8 |

C) 8 : 65 | D) 64.4 : 9 |

Explanation:

Article I Article II

-20 25%

5%

20% 25%

4 : 5

Now, Selling of first article = (4-20%) = 0.8

Selling of second article = (5+25%) = 6.25

Therefore the ratio of selling price = 8 : 62.5

A) 22% | B) 27% |

C) 20% | D) 18% |

Explanation:

Given

125% ---- 3400

=> 100% ---- ?

=> ? = 3400x100/125 = 2720

=> Cost price of the article = Rs. 2720

Profit when article sold at Rs. 3265 = 3265 - 2720 = 545

Hence, Profit% = Gain x 100/cost price

=> P% = 545 x 100/2720

=> P% = 20%

A) Rs. 450 | B) Rs. 360 |

C) Rs. 415 | D) Rs. 500 |

Explanation:

Watson bought the book for Rs. 240 and sold to Johny at a profit of 50%.

**S.P = C.P(1 + P%/100)**

=> S.P for Watson = C.P for Johny = 240(1 + 50/100) = 240 x 1.5 = Rs. 360

Let Johny quoted the marked price of the book as Rs. M

We know, **SP = M.P(1 - Discount(%)/100)**

Here discount = 10% to Shekar,

S.P for Johny = M(1 - 10/100) = 0.9M

But Johny want to earn 25% profit,

=> S.P = C.P(1 + P%/100)

=> 0.9M = 360(1 + 25/100)

=> M = (360x1.25)/0.9

=> **M = Rs. 500**

Therefore, Johny should quote Rs. 500 as the marked price of the book to get 25% profit and allowing 10% discount to Shekar.