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The probability that it rains on a given day is 0.15. The probability that a football match is cancelled when it rains is 0.65. If it doesn't rain, the probability that the match is not cancelled is 0.95. What is the chance that the match is cancelled?

The aim here is to find the probability that the football match is cancelled in both the case that it rains and in the case that it doesn't. This helps to break the question down; we can find the probability...
MT
Answered by Matthew T. • Maths tutor
7011 Views

How do you solve simultaneous equations.

Step 1. Pick one of the equations and move all of the x values to one side of the equal and move all others to the other side e.g X = 2y + 3Step 2. Make sure the X value is not times by a number e.g 2 X, if ...
TM
Answered by Taylor M. • Maths tutor
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Differentiate x^3+ x^2+2=y

This equals to dy/dx= 1/3 x 2 +1/3 x 1 This is because we divide by the power and then minus one from the powerSo it becomes x 3-1 /3 which can be simplified to 1/3 x 2 The 2 is differentiated to 0 because i...
VI
Answered by Vera I. • Maths tutor
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Calculate the diameter of a circle with area 80cm^2 to two significant figures.

First you need to remember the equation area of a circle = πr 2 with r being the radius. Therefore as we are given the area of the cicle we need to rearrange the equation to give us the radius. Therefore thi...
MS
Answered by Matthew S. • Maths tutor
4432 Views

Solve the following equation. 7x^2 = 13x +2

First gather all x terms on left hand side,7x 2 -13x-2=0. Since 7 is a prime number we can begin factorisation,(7x+/-?)(x+/-?)=0. We know there must be a +/-2 and +/-1 in place of the question mark as they m...
LS
Answered by Lewis S. • Maths tutor
3839 Views