Cambridge Maths Academy

수학 모음 (Maths collection) 전체보기 Question. Rebecca has 9 cards, each with a number on them. The numbers are: $$ \begin{align} 2,\quad 2,\quad 3,\quad 4,\quad 5,\quad 6,\quad 6,\quad 7,\quad 9 \end{align} $$ She picks three cards at random without replacement. Rebecca multiplies three numbers to get a score. Calculate the probability that the score is an even number. Solution. Let's consider: the ca..