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Count restricted selections and calculate exact probabilities

DIFFICULTYintrostandardchallenge
QUESTION TYPEMix of allChange
unrestricted count / unrestricted / singleexact composition / exact / singleNOWMix of allRecommended
Question 1 of 8

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A rack contains tags grouped by size

The category counts are 10 small tags, 8 medium tags, 9 large tags

A group of 3 tags is selected

Count the selections for which the selected group contains 0 small tags, 1 medium tag, 2 large tags

(a)3 marks

Complete the displayed combination factors

(b)1 mark

Calculate the number of selections satisfying the condition that the selected group contains 0 small tags, 1 medium tag, 2 large tags

Format: whole number