Hi,

I found this error when investigating a ticket reported by a customer: SERVER-69239

In the document, the result of Computing n Based on the Group Key for $group (without using $sort in descending order)

[
   { _id: { gameId: "G2" }, gamescores: [ 10 ] },
   { _id: { gameId: "G1" }, gamescores: [ 33, 31, 1 ] }
]

should be corrected to:

[
   { _id: { gameId: "G2" }, gamescores: [ 80 ] },
   { _id: { gameId: "G1" }, gamescores: [ 33, 31, 1 ] }
]

I attached a screen shoot to help locate it in the document.  Please let me know if you have any questions.

Thank you.

Regards,

Yuan