**1. What percent of the total weight of the human body is equivalent to the weight of the proteins in the skin in the human body?**

**B.** 1.6

**C.** 0.16

**D**. Data inadequate

**Answer**: Option B

**Explanation**: Let the body weight be x kg.

Then, the weight of skin protein in the body = [16% of [latex]\frac{1}{10}[/latex] of x]kg

\(\frac{16}{1000}\) x] kg

Required percentage = [\(\frac{\frac{16x}{1000 } }{\frac{x}{1 }}\) x 100]% = 1.6%

**2. What will be the quantity of water in the body of a person weighing 50 kg?**

**Answer**: Option B

**Explanation**: Quantity of water in the body of a person weighing 50 kg = (70% of 50) kg

= 35 kg.

**3. What is the ratio of the distribution of proteins in the muscles to that of the distribution of proteins in the bones?**

**B.** 1 : 2

**C.** 2 : 1

**D.** 18 : 1

**Answer**: Option C

**Explanation**: Required ratio = 16 % of {\(\frac{\frac{1}{3 } }{\frac{1}{6 }}\)}

= \(\frac{6}{3}\)

= \(\frac{2}{1}\)

**4. To show the distribution of proteins and other dry elements in the human body, the arc of the circle should subtend at the center an angle of:**

**Answer**: Option C

**Explanation**: Percentage of proteins and other dry elements in the body = (16% + 14%)

= 30%.

Therefore Central angle corresponding to proteins and other dry elements together

= 30% of 360°

= 108°.

**5. In the human body, what part is made of neither bones nor skin?**

**Answer**: Option D

**Explanation**: Part of the body made of neither bones nor skin = 1 – \(\frac{1}{6}\) + \(\frac{1}{10}\)

**1. If for a certain quantity of books, the publisher has to pay Rs. 30,600 as printing cost, then what will be the amount of royalty to be paid for these books?**

**Answer**: Option C

**Explanation**: Let the amount of Royalty to be paid for these books be Rs. r.

Then, 20 : 15 = 30600 : r => r = Rs. \(\frac{30600 × 15}{20 }\)

= Rs. 22,950

**2. What is the central angle of the sector corresponding to the expenditure incurred on Royalty?**

**Answer**: Option C

**Explanation**: Central angle corresponding to Royalty = (15% of 360)°[Where 15% of 360 = \(\frac{15}{100 }\) x 360]

= 54°

**3. The price of the book is marked 20% above the C.P. If the marked price of the book is Rs. 180, then what is the cost of the paper used in a single copy of the book?**

**Answer**: Option B

**Explanation**: Clearly, marked price of the book = 120% of C.P.

Also, the cost of paper = 25% of C.P

Let the cost of paper for a single book be Rs. n.

Then, 120 : 25 = 180 : n => n = Rs \(\frac{25 × 180}{120 }\) = Rs. 37.50 .

**4. If 5500 copies are published and the transportation cost on them amounts to Rs. 82500, then what should be the selling price of the book so that the publisher can earn a profit of 25%?**

**Answer**: Option A

**Explanation**: For the publisher to earn a profit of 25%, S.P. = 125% of C.P.

Also Transportation Cost = 10% of C.P.

Let the S.P. of 5500 books be Rs. x.

Then, 10 : 125 = 82500 : x => x = Rs \(\frac{125 × 82500}{10}\) = Rs. 1031250.

S.P. of one book = Rs.\(\frac{1031250}{5500}\) = Rs. 187.50

**5. Royalty on the book is less than the printing cost by:**

**Answer**: Option D

**Explanation**:

Printing Cost of book = 20% of C.P.

Royalty on book = 15% of C.P.

Difference = (20% of C.P.) – (15% of C.P) = 5% of C.P.

Percentage difference = [\(\frac{Difference}{Printing Cost}\) x 100]%

[\(\frac{5% of C.P.}{Printing Cost}\) x 100]% = 25%.

**1. What percentage of Indian tourist went to either USA or UK ?**

**Answer**: Option B

**Explanation**: (40+10) = 50% (from first chart)

**2. The ratio of the number of Indian tourists that went to the USA to the number of Indian tourists who were below 30 years of age is ?**

**Answer**: Option B

**Explanation**:

40:15 = 8:3

**3. If amongst other countries, Switzerland accounted for 25% of the Indian tourist traffic, and it is known from official Swiss records that a total of 25 lakh Indian tourists had gone to Switzerland during the year, then find the number of 30-39-year-old Indian tourists who went abroad in that year ?**

**B.** 25 lakh

**C.** 50 lakh

**D.** 75 lakh

**Answer**: Option D

**Explanation**: Tourist traffic from other countries to Swiz is 20%.

Amongst this 20%, 25% of traffic from India.

So, 25% of 20% = 5% corresponds to the Indian traffic in Switzerland.

5 % corresponds to Switzerland’s 25 lakh. Hence 15% will be 75 lakh.

**Directions(4-5)**: The following pie chart give the information about the distribution of weight in the human body according to different kinds of components. Study the pie charts and answer the question.

**Answer**: Option A

**Explanation**: Total percentage = (10 / 24) x 100 = 41.6666667 %

**5. How much of the human body is neither made of bones or skin ?**

**Answer**: Option D

**Explanation**: 20 + 10 = 30% is made up of either bones or skin. Hence, 70% is made up of neither.

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