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1answer
18 views

Distribution combinations

How many ways can 25 identical pencils be distributed between two people?.Each all pencils must be shared out. A) Each person must have at least 5 pencils? B) Each person must have at least 7 ...
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0answers
24 views

Comparing test statistics and/or $p$-values from multiple permutation (Mantel) tests on non-independent data

I am comparing the relationship between genetic and geographic distance of individuals in a wild animal population. The hypothesis is that individuals with higher genetic relatedness establish home ...
0
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1answer
187 views

Calculating the expected profit with Probability A level maths CIE

Company sets up display of 20 fireworks! for each firework, the probability that it fails is 0.05,independently of other fireworks the probability that more than 1 firework fails is 0.264 the 20 ...
0
votes
0answers
36 views

Calculating the probabilities of different lengths of repetitions of numbers of length 6

This question is similar to the question I asked here: Calculating the probabilities of different lengths of repetitions of numbers of length 4 except now I'm having problem with numbers of length 6. ...
0
votes
1answer
57 views

Is there a known distribution for this permutation with replacement problem? [duplicate]

Choose $t$ numbers from $n$ $(n>t)$ distinct numbers with replacement and the order of the $t$ numbers matters. Say, $P(X=1) = \dfrac{{numbers\ of\ unique\ t-set \ which\ has\ 1\ distinct\ ...
1
vote
6answers
797 views

Why is the number of possible subsequences $2^n$?

If anyone here is familiar with the Lowest Common Subsequence problem, they probably know that the number of posibble subsequences in a sequence is $2^n$; $n$ being the length of the sequence. ...