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BECE Mathematics 2013 Paper

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Question : 17

Total: 40

If

S=\{1,2,3,4,5,6,7,8,9,10\}

, find the probability that a number selected at random from

S

$\frac{3}{8}$
$\frac{1}{4}$
$\frac{1}{2}$
$\frac{5}{8}$

Solution:

\text{ Probability } = \frac{\text{ Number of possible selection }}{\text{ Number of samples }}

Odd numbers are numbers which are not divisible by 2 without a remainder.

The list of odd numbers from the set

S

are

\{1,3,5,7,9\}

Number of possible selection of an odd number

=5

Number of samples

=10

Probability of

=\frac{5}{10}=\frac{1}{2}

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