given: pack of 52 cards from which 4 are dropped

formula:

we have to find the probability that the missing cards should be one from each suit

since from well shuffled pack of cards, 4 cards missed out total possible outcomes are

n(S)= ⁵²C₄=270725

let E be the event that four missing cards are from each suite

n(E)= ¹³C₁×¹³C₁×¹³C₁×¹³C₁=13⁴