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What is the probability to obtain exactly 2 heads out of 3 tosses of a fair coin?

We will figure out the general question first: if we have n consecutive events with two possible outcomes which we will tell "successes" and "failures" with probabilities p and 1-p, respe...
SG
Answered by Stamo G. • Maths tutor
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outline 2 factors that influence educational attainment

Material deprivation is one factor that affects the educational attainment as it means that the working class are unable to provide better conditions and resources for their children. Douglas identifies the ...
PO
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y=20x-x^2-2x^3. Curve has a stationary point at the point M where x=-2. Find the x coordinate of the other stationary point of the curve and the value of the second derivative of both of these point, hence determining their nature.

Differentiate to get dy/dx=20-2x-6x^2Then stationary points occur when dy/dx = 0 so 0 = 20-2x-6x^2 Factorise to get x= -2, x=5/3Differentiate dy/dx to get second derivative = -2-12x at x=5/3 is -22 so max po...
EJ
Answered by Emily J. • Maths tutor
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What is the difference between the imparfait and the passé composé in French?

I would first make sure that the student knows the difference between the tenses in English, for example , the difference between 'I was going to the shops' 'J'allais aux magasins' and 'I went to the shops' ...
AH
Answered by Antonia H. • French tutor
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What's the difference between prokaryotic cells and eukaryotic cells

Eukaryotic cells are what make up you (and also plants), whereas prokaryotic cells make up bacteria. If you think about the fact that bacteria are way smaller than plants and animals, you can remember that t...
MS
Answered by Matt S. • Biology tutor
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