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Statistics: Dave throws a ball at a bucket. The probability the ball goes into the bucket is 0.4. Dave throws the ball four times. What is the probability that he gets it in twice?

When Dave throws the ball, it can either go into the bucket, or miss. The probability of the ball going into the bucket is 0.4 and each throw is independent of eachother so this probability is the same for e...
JW
Answered by Jack W. • Maths tutor
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How do diffusion and osmosis work?

Imagine someone sprays a deodorant from across the room, eventually it will make its way over to where you are and you can smell it. Diffusion is the spreading out of particles resulting in a net movement fr...
AS
Answered by Atalie S. • Biology tutor
10995 Views

What do I do with the Hardy-Weinberg equation?

p 2 + 2 pq + q 2 = 1 It looks daunting at first but once you get the hang of them they can be easy marks in the exam. p is the frequency of the dominant allele in the population, and q is the frequency of th...
AS
Answered by Atalie S. • Biology tutor
8339 Views

How is RNA different to DNA?

There are a few key points you should remember. RNA has a ribose sugar instead of a deoxyribose sugar, RNA also has uracil instead of thymine, so uracil binds to adenine. The base pairings in RNA are G-C, A-...
AS
Answered by Atalie S. • Biology tutor
5116 Views

Why is inflation desirable?

Inflation is desirable when it is low and stable. The easiest way to explain why is by outlining the consequences should inflation be either too high or too low; 1. If inflation is too high it often becomes ...
FR
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