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There are 35 people in a group. x(x+1) of them have a blue car, 5x of them have a red car, 4 have a blue and a red car and 4x-8 do not have car. Work out the probability that a person who has a blue car, has a red car as well.

We see this question is about conditional probability. Because a person chosen at random from the group satisfies a 1st condition: they have a blue car. And after we know this, they have to satisfy a 2nd con...
AP
Answered by Ana P. • Maths tutor
2759 Views

What did you do last weekend?

Le weekend dernier j’ai rendu visite à mes cousins et j’étais tellement excité car je ne les ai pas vu depuis très longtemps. Nous sommes allés à un centre sportif afin d’essayer l’escalade pour la première ...
GL
Answered by Grace L. • French tutor
6451 Views

Is profit maximisation the most important objective of firms?

Usually in traditional Economic theory we assume firms are profit maximising. In reality this may not be the case. Short run firms seek to maximise sales - e.g. Amazon to gain market share (monopoly power). ...
JW
Answered by Jed W. • Economics tutor
4351 Views

How is an ionic bond formed?

To understand why an ionic bond happens between a non-metal and a metal we first have to understand why bonds are made in the first place. All atoms want to do is be stable! To become stable they must have a...
RC
Answered by Robert C. • Chemistry tutor
3282 Views

What is Hess's law?

The enthalpy change in a reaction is independent of the route taken.
Answered by • Chemistry tutor
2085 Views