[{link:"xyz.com",description:"someDesc",answers:[{text:"someText",likes:1000},{text:"someText2",likes:1}]},{link:"abc.com",description:"someABCDesc",answers:[{text:"someText",likes:10},{text:"someText2",likes:1}]},{link:"def.com",description:"someDefDesc",answers:[{text:"someText",likes:200},{text:"someText2",likes:1}]},{link:"hhh.com",description:"somehhhDesc",answers:[{text:"someText",likes:200},{text:"someText2",likes:0}]}]

db.collection.aggregate([{$addFields:{likesCount:{$reduce:{input:"$answers.likes",initialValue:0,in:{$add:["$$value","$$this"]}}}}},{$match:{likesCount:{$gt:200}}},{$project:{likesCount:0}}])