Question

Elroy enjoys roller skating and weight training. Let X represent the number of hours he spends roller skating weekly,

Answer 1

Answer:

$\mathbf{\mu_S = 12 }$; $\text{Elroy can expect to roller skate and weight train, on average, 12 }$$\text{hours in a typical week.}$

Step-by-step explanation:

Given that:

The mean $\mu_X = 5$

The mean $\mu_Y = 7$

Where;

$S= X+ Y$

$\mu_S = \mu _X + \mu_Y \\ \\ \mu_S = 5+7 \\ \\ \mu_S = 12$

Thus;

$\mathbf{\mu_S = 12 }$;$\text{ Elroy can expect to roller skate and weight train, on average, 12 }$$\text{hours in a typical week.}$