exam Maths Puzzle Numerical Ability

If you select 2 cards from a deck, what is the probability of getting 2 matching cards (2kings, 2fives, and so on)?

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way of pick card a type=13
two of same type= 4c2=6
total=52c2 hence
13*6/52c2
10 years agoHelpfull: Yes(0) No(0)

exam Other Question

Lawanda and Betty both drive the same distance to the shore. By driving 15 miles per hour faster than Betty, Lawanda can get there in 3 hours while Betty takes 4 hours. How fast does each drive?
How do I solve this? x^2-7x-30=0