Edit in JSFiddle

$.when(
    $.ajax({
        url: '/echo/json/',
        data: {json: JSON.stringify({info: "jQuery"})},
        type: "POST"
    }),
    $.ajax({
        url: '/echo/json/',
        data: {json: JSON.stringify({info: "Deferred"})},
        type: "POST"
    }) 
).done(function(result1, result2) {
    alert('Output: ' + result1[0].info + ' ' + result2[0].info) ;
}) ;