One card is dealt. Find the chance that its color is black and its rank is an even number.

Question

terenzreignz · Answer

How many black cards are there?

anonymous · Answer

5/26

anonymous · Answer

52 cards from deck

terenzreignz · Answer

52 cards from the deck, among them, how many are black?

anonymous · Answer

got the answer thankyou 5/26

agent0smith · Answer

sigh... do you understand how to get the answer?

agent0smith · Answer

@ayyaztahir 5/26 might not be correct...

anonymous · Answer

(26/52 ) * (10/52 ) simple

agent0smith · Answer

@harshsinha the point of openstudy is not to just give people the answers. 

And btw, (26/52 ) * (10/52 ) does not equal 5/26...

terenzreignz · Answer

@harshsinha 
You realise that simplifies to 5/52, right?

agent0smith · Answer

There are 26 black cards (clubs and spades), of those, 2,4,6,8,10 would be considered even (not counting Js Qs Ks), so there's 5 even clubs and 5 even spades - so 10 cards that are both black and even.

Probability is desired outcomes (10) over total outcomes... how many total outcomes are there when you pull a card from 52 cards?
$$P = \frac{ desired }{ total }$$

anonymous · Answer

yaa actually its ma mistake its..
for getting black card its 26/52
n for getting its even rank its 10/26 
thus the answer is 26*10 / 52*26

terenzreignz · Answer

Guide the asker to a solution next time, @harshsinha instead of giving the answer outright.  That way, they learn, at least, ideally.

anonymous · Answer

its ohk thanx