So, the question says:
A box contains 15 counters, numbered 1 - 15. If a counter is drawn at random, calculate the probability that the number is less than 6.
To work this out, we need this formula:
Probability of event = no. of ways event can happen / total possible outcomes
Ok, so our event is drawing a number less than 6. And there are 15 total possible outcomes.
There are 5 ways to draw a number less than 6 (1, 2, 3, 4, 5) so this comes to:
P(less than 6): 5/15
This is because out of the 15 total outcomes, 5 of them make our event happen.
This is simplified to:
P(less than 6): 1/3
And that's the answer! There is a one third chance of drawing a number less than 6. Test yourself with our short quiz:
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