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In a stack of CDs, there are 3 types: Rock, Pop and Jazz. There are 2 Rock CDs, x Pop CDs, and (2x+5) Jazz CDs. A CD is chosen at random. If the probability it is Rock is 1/20, work out the probability it is Jazz.

Number of Rock CDs = 2Total Number of CDs = 2 + x + (2x+5) = 3x + 7Probability of Rock CD = 2/(3x + 7) = 1/202/(3x + 7) = 1/2040 = 3x + 7x = 11Number of Jazz CDs = 2x + 5 = 27Total Number of CDs = 3x + 7 ...

Answered by Vinh L. • Maths tutor

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How accurate is it to say that Stalin’s use of terror in the 1930s was fundamentally similar to Lenin’s use of terror in the years 1918–24?

This question is fundamentally asking a question of continuity, it is asking whether the use of regime terror during Stalin's authority was essentially a continuity of the use of terror during Lenin's rei...

Answered by • History tutor

2466 Views

What are the main differences in composition of blood taken from an artery to blood taken from a vein?

An artery which principally supplies cells metabolism would contain more of the 'fuels' required such as oxygen and glucose. A vein typically carries blood containing the waste products of metabolism and ...

Answered by Tegen W. • Biology tutor

12635 Views

Why is there a leading and lagging strand during DNA replication

The double stranded DNA is first unzipped by an enzyme called helicase. Helicase separates the two strands of DNA, and creates the replication fork. Essentialy two single stranded DNA chains are created, ...

Answered by Mark N. • Biology tutor

41217 Views

Lenin and Stalin were equally ruthless in their use of terror - how far do you agree with this statement?

On the surface, Lenin and Stalin were equally ruthless in their use terror. However, by virtue of the length and intensity of Stalin's communist state, the very culture of Russia changes to one of permane...

Answered by Amelia C. • History tutor

7787 Views