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Maths
GCSE

Sasha has a bag containing 12 red beads, and 8 blue beads. She draws one bead from the bag at random. What is the probability that it is blue?

There are 12 + 8 = 20 beads in the bag in total.If sasha draws a bead at random then she has 8 chances out of 20 possible beads that the bead is blue. So the probability that the bead is blue is 8/20 = 2/...

AW
Answered by Alexander W. • Maths tutor
8037 Views

How to solve a simple simultaneous equation

Solving simultaneous equations: Example Question:Equation 1 --->         2y – 4x = 2Equation 2 --->         4y – 6x = 10 Find the unknown quantities, x and y. Solution:

NK
Answered by Nivedah K. • Maths tutor
5112 Views

What is compound interest and how do I calculate it?

Compound interest means, for example, the money you have put into a bank, earns interest each year, but you earn interest upon the interest that was already added last year i.e. you earn interest on t...

RF
Answered by Rocio F. • Maths tutor
11055 Views

How do you find the mean of 5 values?

As a general rule of thumb, to find the mean of a given set of numbers:

add up all the numbers youve been given and divide by the number of values you have.

e.g.

Find the mean ...

OP
Answered by Olivia P. • Maths tutor
29740 Views

What is solution by substitution?

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