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In a bag of 25 coloured balls, 7 are orange, 6 are yellow and the rest are green. Laura picks out a ball and records its colour but doesn't return it to the bag, she then repeats this twice more. What is the probability of Laura getting 3 yellow balls?

Answer: 1/115

The easiest way to solve this problem is to draw part of a tree diagram to see the probabilites of each colour being picked each time Laura pulls a ball out of the bag (a full diagram...

MS
Answered by Manon S. Maths tutor
2846 Views

Briefly describe the Italian subjunctive mood.

In Italian, the subjunctive mood is widely used and expresses uncertainty, doubt and possibility. Moreover, it can be used to convey emotions such as desire. Hence, the subjunctive mood conveys the opposi...

FP
1699 Views

What is the structure of the US government?

The US government is broken into 3 branches: The execuive, the legislator and the judicary, also respectivey known as the president and cabinet, congress and the supreme court. Each branch is seperate fro...

IA
3251 Views

What is productive efficiency?

productive efficency is seen at the lowest point of average cost, which is also where the marginal cost curve cuts the average cost curve. Productive efficiency means that all resources have been allocate...

IA
Answered by Isini A. Economics tutor
2965 Views

Is there an easy way to remember all the basic graphical transformations?

Well yes! Say you're given an equation of y=f(x), you begin by sketching the graph if plotting it is not part of the question, the reason you do this is to get an idea of what the graph looks like (turnin...

DM
Answered by Dimuthu M. Maths tutor
2990 Views

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