EM-2910

Single events and sample space

E Math · Secondary 4 · Hard · Single events and sample space

The table shows the ages of 60 participants in a camp.

Age (years):

8\le a<12

12\le a<15

15\le a<18

Number of participants: 24, 21, 15

One participant is chosen at random. Find, as a fraction in its lowest terms, the probability that this participant is aged 12 or more.

$\dfrac{3}{5}$
$\dfrac{2}{5}$
$\dfrac{3}{10}$
$\dfrac{7}{12}$

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