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April 20, 2014

April 20, 2014

Posted by **A** on Thursday, November 29, 2012 at 7:30pm.

(a) What is the total number of possible outcomes?

(b) What is the probability that the pair of socks selected is grey?

(c) What is the probability that the pair of socks selected is blue?

(d) What is the probability that the pair of socks selected is neither grey nor blue?

- math -
**Reiny**, Thursday, November 29, 2012 at 8:21pma) 3 outcomes:

GG , GB, BB

b) 3 G, and 4B

prob (GG) = (3/7)(2/6) = 1/7

c) prob (BB) = ((4/7)(3/6) = 2/7

d) prob(not both blue or grey)

= prob (BG) + prob(GB)

= (4/7)(3/6) + (3/7)(4/6)

= 2/7 + 2/7 = 4/7

or we could have taken

1 - (1/7+2/7) = 4/7

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