Write the decimal form of 1/5 + 1/4

Step-by-step explanation:

1/5 in decimal form is 0.2

1/4 in decimal form is 0.25

1/5 + 1/4

0.2 + 0.25 = 0.45

The set of population data in option C is the least dispersed from its mean.

Step-by-step explanation:

The observations of first option are 2,3,2,9.

The observations of second option are 4, 0, 4, 0.

The observations of third option are  6, 2, 2, 2.

The observations of fourth option are 9, 3, 5, 3.

Since the variance of third option is minimum, therefore the set of population data in option C is the least dispersed from its mean.