Formula to determine coverage

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This message has been posted by:  m.mitchell at REMOVE-THIS-TO-SENDicrf.icnet.uk (Mike Mitchell)

Quite a qhile I remember seeing a formula that determines the minimum
number of sub clones required of a certain size that should, within a
certain confidence limit, give complete coverage of an insert of given
length. It involved natural logs and things like that.

Can anyone help - or am I going slowly mad?

Thanx

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