I'd love to know where you went to school and earned an ABET accredited CS degree (assuming US) and didn't take calculus, linear algebra, or have any coursework in probability and statistics.
Which is all well and good if you stay on at secondary school (or attend a sixth form college) until you're 18, then go straight on to uni. But that doesn't apply to everyone (some people leave school at 16, or take a break before going to uni). So I can imagine that a lot of CS graduates here in the UK would have studied these aspects of maths quite some time back (and therefore can't remember them very well) or not have studied them at all.
In the US we have this body called ABET which helps define a standard engineering curriculm.