Two coins are tossed, find the probabiliti getting 1. both coins head

1.	Two coins are tossed, find the probabiliti getting 1. both coins heads 2. exactly one head 3. no heads 4. atleast one head.
Answer» S = {HH, HT, TH, TT} : n = 22 = 4 1. m = both heads : (HH) =1 P(2H) = m/n = 1/4 2. m = exactly one H: (HT, TH) = 2 P(one heads) = 2/4 = 1/2 3. m : no heads : (TT) =1 P(no head) = p(2T) = 1/4 4. m = atleast one H : (HT, TH, HH) = 3 P(atleast one H) = 3/4.

Two coins are tossed, find the probabiliti getting 1. both coins heads 2. exactly one head 3. no heads 4. atleast one head.

Answer»

S = {HH, HT, TH, TT} : n = 22 = 4

1. m = both heads : (HH) =1

P(2H) = m/n = 1/4

2. m = exactly one H: (HT, TH) = 2

P(one heads) = 2/4 = 1/2

3. m : no heads : (TT) =1

P(no head) = p(2T) = 1/4

4. m = atleast one H : (HT, TH, HH) = 3

P(atleast one H) = 3/4.