Q. A certain deck of cards contains 2 blue cards, 2 red cards, 2 yellow cards, and 2 green cards. If two cards are randomly drawn from the deck, what is the probability that they will both are not blue?
A. 15/28
B. 1/4
C. 9/16
D. 1/32
E. 1/16
We can have two approches here:
(1). direct find probabilty that both balls are not blue.
6/8 * 5/7 = 15/28
(2). We can find the prob. that both balls are blue and can substract from 1
1- (2/8*1/7) = 27/28
I am getting two different answer but according to probability rule i should get answer same in both way. Please help....
A. 15/28
B. 1/4
C. 9/16
D. 1/32
E. 1/16
We can have two approches here:
(1). direct find probabilty that both balls are not blue.
6/8 * 5/7 = 15/28
(2). We can find the prob. that both balls are blue and can substract from 1
1- (2/8*1/7) = 27/28
I am getting two different answer but according to probability rule i should get answer same in both way. Please help....
Himanshu Chauhan
