What is the variance of the data set? 9, 7, 6.5, 7.5, 7, 8, 5, 6, 7.5, 8

variance = 1.1525

(∑x² - (∑x)²/n)/n

where n = number of data set = 10

the number of possible outcomes that do not show a 1 on the first spinner and show the number 4 on the second spinner is 2.

spinner 1 spinner 2

1                     1

1                     2

1                     3

1                     4

2                   1

2                   2

2                   3

2                   4   = not 1, and 4

3                   1

3                   2

3                   3

3                   4 = not 1, and 4

only 2 outcomes have passed the given condition.

step-by-step explanation: