To increase sales, a local donut shop began putting an extra donut in some of the boxes. Customers are unaware of which boxes had the extra donut, and the shop owner claimed that one in seven boxes had an extra donut. Nine customers each bought one box of donuts at the shop. Let X = the number of customers that bought a box containing an extra donut. What are the mean and standard deviation of X? Provide an interpretation for each value in context.

μx = 1.143 and σx = 0.990; If the shop were to sell many boxes of donuts, the average number of boxes with an extra donut is 1.143 out of 9, and they will typically sell between 0.153 and 2.133 boxes out of 9 with extra donuts.
μx = 1.286 and σx = 1.050; If the shop were to sell many boxes of donuts, the average number of boxes with an extra donut is 1.286 out of 9, and they will typically sell between 0.236 and 2.336 boxes out of 9 with extra donuts.
μx = 1.286 and σx = 1.050; If the shop were to sell many boxes of donuts, the average number of extra donuts is 1.286 out of 9, and they will typically sell between 0.236 and 2.336 extra donuts.
μx = 1.143 and σx = 0.990; If the shop were to sell many boxes of donuts, the average number of extra donuts is 1.143 out of 9, and they will typically sell between 0.153 and 2.133 extra donuts.