Bissoy.com
Doctors Medicines MCQs Q&A

The price of a notebook is 20% of the price of a storybook. The price of a pencil is 10% of price of a pen. The price of a pen and a notebook is Rs. 20 and Rs. 40 respectively. The average price of a notebook and a pencil is what percent of the average price of a storybook and a pen?

The price of a notebook is 20% of the price of a storybook. The price of a pencil is 10% of price of a pen. The price of a pen and a notebook is Rs. 20 and Rs. 40 respectively. The average price of a notebook and a pencil is what percent of the average price of a storybook and a pen? Correct Answer 19.09%

⇒ Average = sum of elements / number of elements

Given,

Let the price of a notebook, a storybook, a pen and a pencil be Rs. a, Rs. b, Rs. c and Rs. d respectively.

The price of a notebook is 20% of the price of a storybook.

⇒ a = (20/100) × b

⇒ a = b/5

⇒ b = 5a

The price of a pencil is 10% of price of a pen.

⇒ d = (10/100) × c

⇒ d = c/10

⇒ c = 10d

Given,

The price of a pen and a notebooks is Rs. 20 and Rs. 40 respectively,

c = Rs. 20 and a = Rs. 40

Then,

⇒ b = 5a

b = 200

The price of a storybooks = Rs. 200

⇒ c = 10d

d = 20/10 = 2

The price of a pencil = Rs. 2

The price of a pencil and a notebooks is Rs. 20 and Rs. 40 respectively,

The average price of a notebook and a pencil =

= (40 + 2)/2

= 21

The average price of a notebook and a pencil = Rs. 21

The average price of a storybook and a pen =

= (20 + 200)/2

= 110

The average price of a storybook and a pen = Rs. 110

Required percentage:

= (21/110) × 100

= 19.09%

TIP:

Since the prices of pen and notebook are given, we do not need to assume their value. We can find the price of storybook and price of pencil and proceed with the calculation. It will take less time

Related Questions

A boy bought 6 Pen, 10 Pencil and 16 Notebook for Rs. 174. Had he bought 10 Pen, 14 Pencil, 12 Notebook, it would have cost him Rs. 242. By how much, a pen and a pencil together cost more than a Notebook.?
The marked price of pen and pencil are in the ratio of 5 ∶ 4 respectively. The ratio between the cost price of pen and pencil is 3 ∶ 2 respectively. If the mark price of the pen gives a profit of 25%, then after giving 20% discount on the pencil, find out what percentage of profit or loss is made on the pencil.
After selling X notebooks, a man earns the profit equal to selling price of Y pens while selling X pens, he losses the amount equal to selling price (Y + 1) notebooks. The numerical values of profit percentage and loss percentage are equal and CP of a notebook is half the CP of a pen. The ratio of selling price of pen and notebook is 2 : 3. From the given statement which of the following can be determined? A. Value of X. B. Value of Y. C. The cost price of pen and notebook.
With the help of a pointer the teacher points three red pens and two blue pencils lying on the table. Pointing to one pencil he says, "This pencil is blue". He then points two pens and says, "These pen are red". He takes one pen in his hand and while putting one pencil in his pocket says, "I have one pen in my hand and I am now putting pencil in my pocket". The above illustration best describes which one of the following approach to teaching-
In the question below are given three statements followed by four conclusions I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts. Statements: No paper is pen. Some pen are pencil. No pencil is eraser. Conclusions: I. All easer are paper is a possibility. II. All pencil are eraser. III. No pen is eraser. IV. All pencil are paper.
If pen is called photobook. photobook is called pencil. pencil is called notebook. and notebook is called eraser. what will the students write in?
A student has 2 books and 1 notebook. The cost of one notebook is Rs. 96. If she sells notebook with first book, she receives the amount twice the value of second book. And if she sells notebook with second book, she receives amount which is less than value of first book by INR 306. What is the value of first book?
In the box, the price of 50 books is 75% of the price of 120 notebooks. The price of a pen is Rs.20. The price of a pen is 40% of price of a notebook. If 10 same pens are added into the box, then what is difference in the price of book and the price of the notebook?
Ruhi is shown three pencils and she observes that pencil A is longer than pencil B and pencil B is longer than pencil C. When Ruhi infers that A is a longer pencil than C, which characteristic of Jean Piaget’s cognitive development is she demonstrating?
Six boxes containing different items namely, Copy, Pen, pencil, Scissor, Tape and Paper, are kept in a straight line, one after the other, not necessarily in the same order. The box of Pen is kept at the third position in the line from the left end. The box of Paper is kept at the extreme right end. The box of Pencil is kept somewhere between box of pen and box of paper. The box of Tape is kept at the left of the box of Pen but at the right of the box of Copy, when counting from the left end. The box of scissor is not kept immediately next to Paper. Which box is kept at the second position from the right end?