Answer:
(D) 112
Step-by-step explanation:
First step: Arrange all the numbers from in ascending order that is from smallest to largest.
In Ascending order the set becomes:
45,99,108,116,118,118,118,119,120,121,124,130,148.
Second step: Find the median of the set of numbers.
Median is the middle number.
The median is 118. The median is also called the second quartile(Q2).
Third step: Now we consider all the numbers to the Left of the median(Q2). The numbers are listed below:
45,99,108,116,118,118.
Now we will find the median of these numbers.
The total numbers are 6 which is an even number.
To find the median of an even number, we add the two middle numbers and divide them by 2.
The two middle numbers are 108 and 116.
Therefore 108+116 = 224.
224/2 =112.
Therefore 112 becomes the first quartile (Q1).
