A card is drawn from a well shuffled deck of cards.
i)What are the odds in favour of getting spade?
ii)What are the odds against getting a spade
iii)What are the odds in favour of getting a face card
iv)What are the odds in favour of getting a red king

Ans:
i) 1:3
ii) 3:1
iii)3:10
iv)1:25

I have the answers but I want to know how to do this question. Can the Meritnation experts please explain how do you solve this question