Mathematics 0580 · IGCSE · Relative and expected frequencies

Relative and expected frequencies — practice question

The table gives the counts of screws with different lengths in a box containing $100$ screws.

(a)[1]

Find the probability that the screw is $50$ mm long.

(b)[2]

Find the probability that the screw is shorter than $60$ mm.

(c)[1]

Find the probability that the screw is $70$ mm long.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$\frac{24}{100}$” …