book Maths Puzzle Numerical Ability

explain how to find the probability of independent events.use examples.

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book Other Question

The sum of two numbers is 208. One-third of the greater number equals the smaller number. What are the numbers? I am trying to re-write the following formula into a quadratic equtation and I seemed lost.

((48/n)+3)(n-2)= ((48/n)+3)(n-2)-48