Bissoy.com
Doctors Medicines MCQs Q&A

An officer ordered 3 computers of brand X and some computers of brand Y. The price of one computer of brand X was thrice that of brand Y. When the order was executed, it was found that the numbers of the two brands has been interchanged. This increased the bill by 50%. Find the ratio of the number of brand X computers to that of brand Y computers in the original order was.

An officer ordered 3 computers of brand X and some computers of brand Y. The price of one computer of brand X was thrice that of brand Y. When the order was executed, it was found that the numbers of the two brands has been interchanged. This increased the bill by 50%. Find the ratio of the number of brand X computers to that of brand Y computers in the original order was. Correct Answer 3 : 7

Let the no of computers of brand Y = n and the cost of 1 computer of brand Y = Re. 1

∴ Original cost of brand Y computer = Rs. n and original cost of brand X computer = Rs. 3 × 3 = 9

∴ Total original cost = Rs. (n + 9)

In the case of executed order,

Cost of brand X computer = Rs. 3n

And cost of brand Y computer = Rs. 3

∴ Total cost of executive order = Rs. (3n + 3)

As per the question,

150% of (n + 9) = 3n + 3

⇒ 150/100 × (n + 9) = 3n + 3

⇒ 3/2 × (n + 9) = 3n + 3

⇒ n + 9 = 2n + 2

∴ n = 7

∴ Required ratio = 3 : 7

Related Questions

Manas ordered 6 Levis jeans and some additional Blackberry jeans. The price of one Levis jeans was twice that of one Blackberry jeans. When the order was executed it was found that the number of the two brands had been interchanged. This increased the bill by 40%. The ratio of the number of Levis jeans to the number of Blackberry jeans in the original order was:
A person ordered 5 pairs of black socks and some pairs of brown socks. The price of a black pair was thrice that of a brown pair. While preparing the bill, the bill clerk interchanged the number of black and brown pairs by mistake which increased the bill by 100%. What was the number of pairs of brown socks in the original order?
What is correct about Panchayat election? i. There is one district election officer. ii. There are one or more returning officers. iii. State election commission appoints returning officer. iv. With the consent of commission District Election Officer can appoint returning officer. v. Naib Tahsildar may be returning officer for Janpad Panchayat.  vi. Naib Tahsildar may be returning officer for Gram Panchayat. vii. Naib Tahsildar may be returning officer for Zilla Panchayat. viii. District election officer himself only returning officer.
Arushi, Ayushi, Alia, Aman, Amar and Ayush are members of the same family. They all have different brands of mobile phones - Samsung, Moto, Oppo, Xiaomi, Apple, Sony. Arushi has Moto mobile phone. Neither Aman nor Amar has a mobile phone of brands Samsung and Apple. Alia does not have a mobile of the brand Samsung. Ayush does not have mobile of brands Xiaomi and Samsung. Alia has a mobile phone of brand Xiaomi. Amar does not like Oppo brand phones.  Which brand of phone does Aman like?
Abhishek ordered 6 pair of red shoes and some pair of books. The price of a pair of red shoes is double than that of a pair of book. While preparing the bill the shopkeeper interchanged the number of pair of shoes and books by mistake which increased the bill by 40%. What was the ratio of the number of pair of red shoes and the number of pair of books in the original order?
A man ordered 10 physics books and some chemistry books, The price of a chemistry book is twice the price of a Physics book. While preparing the bill, the clerk interchanged the number of physics and chemistry books by mistake, which decreased the bill by 12\(\frac{1}{2}\)%. The ratio of the number of physics books to the number of chemistry books in the original order is:
The question given below consists of a statement, followed by three arguments numbered I, II and III. You have to decide which of the arguments is/are ‘strong’ arguments and which is/are ‘weak’ arguments and accordingly choose your answer from the alternatives given below each question. Statement: As a trade war looms, one of Chinese President Xi Jinping’s biggest weapons could be boycotts of American brands by his country’s legion of consumers. But Xi would also be risking collateral damage at home, The China operations of all-American brands ranging from Coca-Cola Co. and McDonald’s Corp. to Walt Disney Co. are co-owned by state-backed Chinese firms.  Which among the following arguments support the above statement in the best possible manner? Arguments: I. One of Coke’s main China partners is government-backed COFCO Corp., Shanghai Disneyland is part owned by a local consortium, and McDonald’s franchisee in the country is controlled by state-backed conglomerate Citic Ltd. and private-equity firm Citic Capital Holdings.  II. Even when Chinese companies don’t have direct ownership links with U.S. brands, boycotts or other non-tariff retaliation would hit the local partners of those American companies. III. The number of big clean wins in terms of striking against the other guy (American brands) - without accidentally punching your own guy (Chinese firms) in the face - is extremely large.
A man ordered 4 pairs of black socks and some pairs of brown socks. The price of a pair of black socks is double that of a brown pair. While preparing the bill the clerk interchanged the number of black and brown pairs by mistake which increased the bill by 50% . The ratio of the number of black and brown pairs of socks in the original order was = ?
In the following question, the first and the last part of the sentence/passage are numbered 1 and 6. The rest of the sentence/passage is split into four parts and named P, Q, R, S. These four parts are not given in their proper order. Read the sentence/passage and find out which of the four combinations is correct. S1. The modern-day computer has become an important part of our daily life. P. The mobile phone is also a type of computer because it fulfills all the criteria of being a computer. Q. Also, they are used in many fields like agriculture, designing, machinery making, defense, and many more. R. The computer is categorized into many different types like supercomputers, mainframes, personal computers (desktop), PDAs, laptops, etc. S. Nowadays, they use computers in every office whether private or government. S6. As the usage of computers increased it became a necessity for almost every field to use computers for their operations. 
An Identity Card has the number ABCDEFG, not necessarily in that order, where each letter represents a distinct digit (1, 2, 4, 5, 7, 8, 9 only). The number is divisible by 9. After deleting the first digit from the right, the resulting number is divisible by 6. After deleting two digits from the right of original number, the resulting number is divisible by 5. After deleting three digits from the right of original number, the resulting number is divisible by 4. After deleting four digits from the right of original number, the resulting number is divisible by 3. After deleting five digits from the right of original number, the resulting number is divisible by 2. Which of the following is a possible value for the sum of the middle three digits of the number?