Thank you for downloading more or less from the BBC.

This is the version of the programme first broadcast on BBC Radio 4 on the 17th of May 2013.

Here's Tim Halford.

Hello and welcome to more or less melting the statistical chocolate chips in the great news cookie of life.

This week we try to unravel the mystery of the UK unemployment figures

and is Christine Hamilton right about Romanians?

68,000 of them are already here, of whom 28,000 have been arrested for serious offences since 2008.

But first, earlier this week, Hollywood actor Angelina Jolie wrote in The New York Times

that she'd undergone a preventative double mastectomy.

Jolie's doctors had estimated that she had an 87% risk of developing breast cancer.

That's a very specific figure, so we've been having a closer look at it and Ruth Alexander's here. Hello Ruth.

Hello, it is very specific and high.

So how would this figure have been calculated?

Well we are Dr Katani, a Senior Science Manager at the Charity Cancer Research UK.

There are various computer programmes where you put all sorts of things in,

you put genetic information, family history, all sorts of stuff in and it spits a number out,

which is why she's probably got this very precise sounding number.

By having her breasts removed, you remove most of the tissue that could become cancerous.

She still says that she has around a 5% chance of developing breast cancer,

which is about half of that of an average woman in the general population.

But by having this operation, she's got rid of most significant amount of the kind of tissue

that could become cancerous and cause her a problem.

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