Question

find the mean of the given number​

Answer 1

Answer:

mean of this data is 2.725

Step-by-step explanation:

$1 \frac{1}{2} = \frac{3}{2} \: \: = 1.5 \\ 2 \frac{1}{5} = \frac{11}{5} = 2.2 \\ 3 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \\ 4 \frac{1}{5} = \frac{21}{5} = 4.2 \\ \: mean \: = \frac{sum \: of \: observation}{no. \: of \: observation} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{1.5 + 2.2 + 3 + 4.2}{4} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{10.9}{4} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 2.725$