"are you expecting me to believe that there have been more 757 deliveries than 747 ones????????"
Keep in mind that the B757 was/is an incredibly versatile aircraft for medium and short-haul service operated by a substantial number of scheduled AND
charter operators worldwide.
The 747 by comparison at least was/is more of a "niche" aircraft mainly flown by the biggest airlines for International long-haul missions. Of the major US carriers, AA
, US, NW
, and even HP
, only NW
has a 747 fleet, while all of them have a significant number of 757's.
The 747 is probably by far the most famous aircraft ever built, but that doesn't necessarily equate to most common.