[{"_id":"6062e68c132e2d61d168df1d","quizID":"6062a21d697cd216b4ce2a6a","response":[{"questionID":["605dcfe57ad11ec729147b2e"],"_id":"6062e68c132e2d61d168df1e","userResponse":1,"status":"correct"},{"questionID":["6060784b59026c2a238174f9"],"_id":"6062e68c132e2d61d168df1f","userResponse":3,"status":"wrong"},{"questionID":["6060786159026c2a238174fd"],"_id":"6062e68c132e2d61d168df20","userResponse":2,"status":"wrong"}],"userID":"605da5b08174cf7c1f67100d","__v":0}]

db.collection.aggregate([{$project:{res:"$response.status",result:{correct:{$size:{$filter:{input:"$response.status",cond:{$eq:["$$this","correct"]}}}},incorrect:{$size:{$filter:{input:"$response.status",cond:{$eq:["$$this","wrong"]}}}}}}}])