There are 3 dimes and 3 quarters in a coin purse. If 4 coins are chosen at random from the purse, what is the probability of getting more than 65 cents?
a)1/5
b)2/5
c)1/2
d)3/5
e)4/5
OA after some discussion
65 cents requires some combination of QQQQ, QQQD,QQDD, but I get stuck with these probability PC problems. Could someone breakdown clear, logical steps?
thx
a)1/5
b)2/5
c)1/2
d)3/5
e)4/5
OA after some discussion
65 cents requires some combination of QQQQ, QQQD,QQDD, but I get stuck with these probability PC problems. Could someone breakdown clear, logical steps?
thx
