MEDAL AND FAN

John puts the letters of the word SCIENCE on pieces of paper and puts the pieces in a bag. He draws two letters
without looking. The first piece of paper is not replaced before the second piece is drawn. What is the probability that
John draws a C twice?

Question

MEDAL AND FAN

John puts the letters of the word SCIENCE on pieces of paper and puts the pieces in a bag. He draws two letters
without looking. The first piece of paper is not replaced before the second piece is drawn. What is the probability that
John draws a C twice?

anonymous · Answer

2 out of 7. if you're expecting a more mathmatical answer, i can't give you that. :P

anonymous · Answer

thats not an answer choice tho..
A) 2/49
B)1/7
C)1/14
D)1/21

anonymous · Answer

you should of given the possibilties of answers. sorry. :(

anonymous · Answer

do those make sense now?

anonymous · Answer

uhhh im not sure...

anonymous · Answer

do you know anyone else that can helpp?

kirbykirby · Answer

There are 2 "C" out of 7 letters.
P("C" on first try AND "C" on 2nd try) = P("C" on first try") * P("C" on 2nd try)

P("C" on first try) = 2/7 

On the 2nd try, you removed a C, so only 6 letters are left. Hence, P("C" on 2nd try) = 1/6

Thus,P("C" on first try AND "C" on 2nd try) = (2/7) * (1/6) = 2/42 = 1/21