Question

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

and let y represent the number of hours he spends weight training weekly. The mean of X is 5 hours, and the mean
of Y is 7 hours. Which answer choice correctly calculates and interprets the mean of the sum, S = X + Y?

Answer 1

C ♡♡

Explanation:

jus took the quiz !!!

Answer 2

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

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.}`