I have four different sweaters. Every day I choose one of the four sweaters at random to wear. Let X be the number of different sweaters I wore during a 5-day week.

(For example, if my 5-day sweater sequence is 3,2,4,4,2 then X = 3 because that week I wore sweaters {2,3.4}.)

Find the mean of X.

Mean is 6

Step-by-step explanation:

Mean refers to the average of the observations.

Let X be the number of different sweaters I wore during a 5-day week.

Possible values of X = 1, 2, 3, 4

For X = 1,

For X = 2,

For X = 3,

For X = 4,

To find: Mean

Solution:

an

y = 6x -3y -12

y +3y +12 = 6x

=> . x = { 2y / 3 +2 } this is equation of line in terms of x

=> . if line meets the x-axis the co-ordinates of meeting point would be ( x , 0 )

=> . x = 2 ( 0 ) / 3 + 2

=> . x = 2

so, the point is ( 2 , 0 )