Mathematics 0580 · IGCSE · Relative and expected frequencies

Relative and expected frequencies — practice question

A bag has 7 red discs, 5 green discs and 2 pink discs inside it.

(a)[2]

Find how many times she would expect to select a green disc.

(b)[2]

Find the number of pink discs that Helen added to the bag.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct working for finding the proportion” …