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A trader buys 6 watches at £25 each. He scratches one of them, so he sells that one for £11. He sells the other 5 for £38 each. Find his profit as a percentage.

Percentage profit = (profit/original )x 100

To find the profit; £38x5+11 - (6x£25) = £51

Percentage profit = (£51/6x25)x100 = 34%

Answered by Idris N. • Maths tutor

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What are the top ways to prepare for a Human, Social and Political Science interview at Cambridge?

Human, Social and Political Science (HSPS) is a broad course meaning interviews can go many different ways! Some interviewers will choose to lead the interview with questions surrounding the entrance essa...

Answered by Faria T. • Oxbridge Preparation tutor

4115 Views

How do you analyse and evaluate a primary source?

Analysing a primary source is, essentially, the same for any period of history. When you analyse and evaluate a source, you're really asking how useful it is. Therefore, we need to first define what &quo...

Answered by Gemma M. • History tutor

2323 Views

Determine the tangent to the curve y = sin^2(x)/x at the point, x = pi/2. Leave your answer in the form ax+by+c=0

First determine the y coordinate of the curve at the given x coordinate, in this case, y = sin²(pi/2)/(pi/2) = 1²/(pi/2) = 2/piDifferentiate the function with respect to x to determi...

Answered by Thomas B. • Maths tutor

5023 Views

Describe the process of natural selection

Within a population of a species there will be variation between individuals. These variations arise because of mutations causing differences in alleles and phenotypes. Some individuals will have an allel...

Answered by Harry R. • Biology tutor

2580 Views