Mathematics 4024 · O Level · Probability of combined events
Probability of combined events — practice question
Inside the bag are these $9$ letter tiles: I, S, O, S, C, E, L, E, S.
(a)[1]
Nur picks one tile from the bag at random, records the letter, and then puts the tile back into the bag. Find the probability that she does not pick an $E$.
(b)[3]
Nur now chooses two of the $9$ letter tiles at random without replacement. Find the probability that the two tiles have the same letter.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Probability = $\frac{7}{9}$” …