By selling a book for Rs.400 a student got two successive profits of 12% and 40% respectively. Then his total profit is a.62%
b.50%
c.55%
d.56.8%

The total profit made by the student is 56.8%

The correct answer is D

Given parameters:

final price in which he book was sold = Rs.400

the first profit made by the student = 12% = 0.12

the final profit made by the student = 40% = 0.4

To find:

To find the total profit made by the student, we have to find the initial cost price of the book.

The cost price of the book before the student made the profit of 40%.

Let this cost price = y

100%y + 40%y = 400

140%y = 400

1.4y = 400

This cost price become the new selling price before the student made the profit of 12%.

The cost price of the book before the student made the profit of 12%.

Let this cost price = x

100%x + 12%x = 285.71

112%x = 285.71

1.12x = 285.71

This is the initial cost price of the book

The total profit made by the student is calculated as;

Thus, the total profit made by the student is 56.8%

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C 55% hope this helps you

where are the images of the functions i can only see the question you typed.

step-by-step explanation:

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation: