Question
A seller marked the price of an item at Rs. 3,000. The
seller gave successive discounts of (y + 3)% and (y - 3)% to a customer. If the customer paid Rs. 2,430 for the item, then find the value of 'y'.Solution
ATQ; SP of the item = 3000 × (1 - (y + 3)/100) × (1 - (y - 3)/100) = 2430 or, {(100 - y - 3)/100} × {(100 - y + 3)/100} = 2430/3000 or, (97 - y) × (103 - y) = (2430/3000) × 100 × 100 or, 97 × 103 - 97y - 103y + y² = 8100 or, y² - 200y + 9991 - 8100 = 0 or, y² - 200y + 1891 = 0 or, y² - 10y - 190y + 1891 = 0 or, y × (y - 10) - 189 × (y - 10) = 10 or, (y - 10) × (y - 189) = 10 So, y = 10 or y = 189 But, y = 189 is not possible because the discount cannot be more than 100%. Therefore, y = 10
PONTIFICATE
1. The Maoists are kept at bay by consistent combing operations by elite commando forces.
2. Police are keeping a close watch on the attempts by...
What is an adjective?
The advent we entertained and informed ourselves/(P) of satellite television was a silent/(Q) and completely changed the way/(R) revolution which create...
1. The Governor acknowledged the services of the scientists, doctors, paramedical staff, nurses and other frontline warriors.
2. They helped t...
But understanding what constitutes such (a miracle diet), and making sure that patients get it, isn’t as straightforward as it seems.
Identify the highlighted part of speech, choose the correct answer
The director told the actors, “ Do your best and we’ll be a hit”.
...Organizing World Cup matches in England imply that rains can be a constant threat.
Find the part containing error. If none of the four parts contains error, mark ‘No Error’ as your answer.
Her most unique sense of (A) / st...
Fill in the blanks with appropriate prepositions from among the choices given below them.
We enjoy listening to the twittering birds as we walk _...
