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Maths
GCSE

What is the multiplication rule in probability?

If presented with an 'AND' statement, multiply the probabilites of each individual event happening by one another,If rolling a die, what is the probability of landing a 1 AND then a 21/6 * 1/6 therefore p...

NJ
Answered by Nidhish J. • Maths tutor
4319 Views

Rearrange aq - ac = d

Start by factoring out the common term, so in this case a.

a(q - c) = d

Now divide by a on both sides to isolate the (q - c)

(q - c) = d/a

Now ad...

AS
Answered by Avnish S. • Maths tutor
4959 Views

What are surds and how does multiplying them work?

A surd is an irrational number which cannot be expressed as a fraction or a recurring number. E.g. root 2 = 1.4142135…. and it continues (but it does NOT repeat like a recurring fraction though)

FS
Answered by Febi S. • Maths tutor
8376 Views

What is Standard form? And when can I use it?

Standard form, also referred to as standard index form is a method of writing really big and really small numbers. It uses powers of 10 to express its size.Standard form is used all the time in science an...

CL
Answered by Ceri L. • Maths tutor
25250 Views

The number of uniform spherical shots that can be made from a given mass of lead varies inversely to the cube of the radius. When the radius is 1mm the number of shots made is 2744. How many shots of radius 1.4mm can be made from the same mass.

The key to long questions like these is picking out the key information quickly.
We have 2 pieces of information we are interested in, the number of shots and the radius of each shot, so let's assign...

JJ
Answered by Joshua J. • Maths tutor
4633 Views

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