Aiden McCall- Numbas at mathcentre.ac.uk

○

Aiden McCall on Use formulae for the area and volume of geometric shapes 7 years, 4 months ago

Gave some feedback: Needs to be tested

○

Aiden McCall on Calculate the areas of polygons 7 years, 4 months ago

Gave some feedback: Needs to be tested

○

Aiden McCall on Calculate the areas of polygons 7 years, 4 months ago

Gave some feedback: Has some problems

○

Aiden McCall commented on Basic Probability Questions 7 years, 4 months ago

Question:

Needs a comma between outcomes and you. "For equally likely outcomes, you can..."

I would personally change 'happening' to 'occuring'.

I would also change 'So' to 'Therefore'.

Change 'Let's say' to 'If'.

The question with the example does seem quite wordy. I was wondering if you would be able to reduce the words by having a table for the line starting "We roll a...".

I don't think you need a comma after "fair" in "fair 6-sided die". I would then place the comma as follows, "fair 6-sided die, we are equally..."

I also don't think you need a comma after 'Hence'.

For c) I would add another answer with the same numerator but different denominator. This is because you do not have to calculate the probability but just look for the numerator with the same value as the blue balls. I understand that in the cases of simplification this may not be the case, but I think these occur less often then not.

Advice:

a) i) "Now we must think how many outcomes are there that result in an even number being rolled." I would remove are there that so it reads as follows.
"Now we must think how many outcomes result in an even number being rolled.

c) "As the ball is being selected randomly from the bag, there is an equal probability of selecting a ball which is any of the 3 colours."

I am not sure this statement is true or at least reads such that, there is an equal probability of selecting any of the 3 colours when the probabilities for the selection of the three colours are different.