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One of the teachers at a school is chosen at random. The probability that this teacher is female is 3/5. There are 36 male teachers at the school. Work out the total number of teachers at the school.

This is a 3 marks exam question from the 2016 summer exam with the Edexcel board. The topic tested here is probability. We are given that the probability of having a female teacher is 3 out of 5. This means ...
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Answered by Eitel M. • Maths tutor
11566 Views

Explain why people continue to live close to active volcanoes. Use examples in your answer. (5 marks)

People continue to live close to active volcanoes for many reasons. For example, people still live close to Mount Vesuvius in Italy because of the fertile soil that is found on the slopes of the volcano. Thi...
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Answered by Tegan E. • Geography tutor
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Trend in Melting point going down group 1 elements

Going down group 1 the period number increases. This means the number of shells increases, leading to a decrease in electrostatic attraction between the positive nucleus and outer most electrons. This weaker...
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Answered by Amin U. • Chemistry tutor
14024 Views

Describe how crude oil is separated by fractional distillation.

Crude oil is composed of hydrocarbons of different lengths. In a fractional distillation chamber, the crude oil is heated and cooled to different temperatures. The shorter chain hydrocarbons will boil at a l...
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Answered by Sophie P. • Chemistry tutor
13455 Views

Can you solve 18-7x < 12-3x ?

In order to solve this formula, you would need to collect similar terms to the same side and then simplify to work out the value of 'x'. We can do this by collecting all the 'x' terms to one side first, trea...
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Answered by Blessing F. • Maths tutor
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