Reply to post: Re: Efficient Market

What's that? Uber isn't actually worth $82bn? Reverse-gear IPO shows the gig (economy) is up

Clive Galway
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Re: Efficient Market

"85% of people who sometimes ride bikes also sometimes drive cars"

Citation please.

Maybe you are mis-quoting this? https://www.cyclinguk.org/statistics

"85% of the people aged 18+ who cycled also held a driving licence"

But then the other statistic is wildly different to what you quoted:

"31% of the people who held driving licences also cycled"

Given two sets, C (Cyclists) and D (Drivers)...

C ∩ D is 10% of D ("Only 1 in 10 drivers also cycle")

C ∩ D is 85% of C ("85% of people who sometimes ride bikes also sometimes drive cars")

Therefore, D is ~8.5x more than C ?

Is my maths wrong? Really trying to wrap my head around these statistics

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