Shirts in a clothes shop come in the following four sizes: Small (S) Medium (M) Large (L) Extra Large (XL) Kristina makes the following list, showing the size of each of the shirts in the shop - Junior Cycle Mathematics - Question 1 - 2016

The frequency for each shirt size is as follows:

To find the probability of picking a large (L) shirt, we use the formula:

$P(L)= \frac{\text{Number of large shirts}}{\text{Total number of shirts}}$

Substituting the values:

$P(L) = \frac{3}{18} = \frac{1}{6}$

After displaying one (L) shirt, the total number of remaining shirts is now 17. The number of small (S) shirts is still 5. Therefore:

$P(S) = \frac{\text{Number of small shirts}}{\text{Remaining total number of shirts}}$

Substituting the values:

$P(S) = \frac{5}{17}$