Two cards are drawn at random from a pack of 52 cards. What is the probability that either both are black or both are queen? Choose the correct choice from the following answers:
A) 4/26 B) 55/221 C) 56/221 D) 55/220 E) 57/220
Probability of taking 2 from 52 cards = 52C2 = 52 * 51/2*1= 
<gadget id="calculator">52 * 51/2*1</gadget>
<output>1_326</output>
1326   There r 26 black cards   There r 4 queens   prob that both r black cards P(A)= 26C2/1326 = 26 * 25/2 * 1= 
<gadget id="calculator">26 * 25/2 * 1</gadget>
<output>325</output>
325/1326   prob that both r queens P(55/221)= 4C2/1326 = 4 * 3/2 * 1= 
<gadget id="calculator">4 * 3/2 * 1</gadget>
<output>6</output>
6/1326   P(A n 55/221)= 2C2/1326 = 1/1326   P(A U 55/221) = P(A) + P(55/221) - P(A n 55/221) = 325/1326 + 6/1326 - 1/1326   =&gt; 55/221   ANSWER:55/221
<result>B</result>
Two cards are drawn at random from a pack of 52 cards. What is the probability that either both are black or both are queen?