⚡ Build the skills to land top-paying quant jobs. Offer ends in 26d 11h 21m 01s26 days 11 hours 21 minutes 1 seconds.
Cards are dealt one at a time from a well-shuffled standard -card deck. Given that the first (the first card of rank two) appears before the first ace, find the expected number of cards dealt strictly between the first and the first ace.