UCAT probability questions

Is there probability in the UCAT? Yes. Decision Making includes probabilistic reasoning: chance, expected outcomes and which option is better on average.

A game costs £2 to play. You roll a fair six-sided die and win £10 if you roll a 6. Otherwise you win nothing.

Which statement is true?

Question 1 of 6

Pick an answer

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Questions people ask

What is expected value?

The average result per go: multiply each outcome by its probability and add them up, then subtract any cost.

Do I need a formula sheet?

No. You need multiplication, fractions and counting outcomes, plus the on-screen calculator.

Keep going

How we work this out

What it does

Work out each chance or average, pick an answer, and see the quickest working.

Probability and expected value in UCAT Decision Making.

Method

  1. Expected value: multiply each prize by its chance, add them, then take off the cost.
  2. Each wrong choice is a common slip: forgetting the cost, replacing a counter that was not replaced, or confusing the two directions of a test result.

Sources

Checked .

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