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What is the probability of picking a red ball twice from a bag of 6 blue balls and 3 red balls, without replacement.

The probability of picking a ball from a bag is the number of balls of that colour divided by the total number of balls. Therefore in the first instance, the probability of a red ball is 3/9 or 1/3rd. If tha...
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Answered by Toby F. • Maths tutor
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If a bag contains 6 green balls and 3 red balls, what the probability of picking out 2 red, with and without replacement.

For the first ball the probability we pick a red ball is the same, it's the number of red balls divided by the total number of balls. Which in this case is 3/9. If we replace the balls the chance of picking ...
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Answered by Toby F. • Maths tutor
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Describe how the structure of ATP is similar to and differs from the structure of a DNA nucleotide.

First of all, one can tell a lot about the structure of these molecules by looking at their full names - Adenosine triphosphate and deoxyribose nucleic acid. There are many structural similarities between AT...
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Answered by Alfie B. • Biology tutor
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Remove the brackets: −{−2[x−3(y−4)]−5(z+6)}

First Step: - {-2[x-3y+12]-5z-30} Second Step: - {-2x+6y-24-5z-30} Third Step (Order is x,y, then z) : - {-2x+6y-5z-54} Final Step: 2x-6y+5z+30
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Answered by Victoria Z. • Maths tutor
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How can I form a strong argument in an essay about a text (ie a novel, play or poem)?

To make sure you're making a well-informed argument, you ought to use a structure that is backed up by plenty of evidence. To think about this you can use the PEEL method: P is for POINT- make your point abo...
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