What is the probability of drawing a straight flush 10JQKA o

What is the probability of drawing a straight flush (10-J-Q-K-A of hearts) from a fair deck of cards when the first four cards drawn are the 10, K, Q, A of hearts, in that order?

Solution

correct answer B 1 out of 6497400

This is a permutation problem because we have to get 10,K,Q,A in that order from 52 cards

1 out of 52P4 =6497400