Answer
no
Work Step by Step
The fixed costs will not change, so the marginal cost of the 11th flight is the additional costs for flight crew and food.
$20000\div10=2000$
15 passengers each paying \$100 would bring in marginal revenue of
$15\times100=1500$
Since the marginal revenue is less than the marginal cost, adding the 11th flight does not make sense.