In order to get an estimate of the population of a town, local officials gave every household in town a number and then chose every seventh house to check the number of residents. which type of sampling is this? a) cluster sampling b) simple random sampling c) systematic sampling d) stratified sampling

The expected value of the random variable : 0, 1 and 2

Step-by-step explanation:

Number of yellow balls in the bag = 5

Number of red balls in the bag = 6

Number of green balls in the bag = 4

No. of balls needed to be drawn from the bag = 2

A random variable assigns the number of green marbles to each outcome.

So, Expected value of random variable is given by :

No green ball in two draws, so random variable is assigned 0

One green ball in two draws, so random variable is assigned 1

Two green ball in two draws, so random variable is assigned 2

Hence, The expected value of the random variable : 0, 1 and 2