The number of rainy days during the past 6 months in a city are12817181013What is the first quartile (Q1)?Question 29Answera.10b.9.5c.11d.9

To find the first quartile (Q1), we first need to put the data in order from least to greatest.

The data given is: 1, 2, 8, 17, 18, 10, 13

When we arrange it in ascending order, we get: 1, 2, 8, 10, 13, 17, 18

The first quartile (Q1) is the median of the first half of the data. Since we have 7 data points, the first half of the data is the first 3 numbers (1, 2, 8).

The median of 1, 2, 8 is 2.

So, the first quartile (Q1) is 2.

However, none of the options (a.10, b.9.5, c.11, d.9) match this answer. There might be a mistake in the question or the provided options.