Question

answer these question

Answer 1

a) 1/4
b) 2/4
c) 1/4
d) 2/4

Answer 2

sample space = { HH,HT,TH,TT }
n(s) = 4


event A - to get 2 heads
A = {HH} n(A) = 1

P(A) = n(A) / n(S) = 1/4


event B - to get at least 1 head
B = {HH,HT,TH} n(B) = 3

P(B) = n(B)/n(S) = 3/4



event C - no head
C = {TT} n(C) = 1

P(C) = n(C)/n(S) = 1/4



event D - exactly 1 tail
D = {TH,HT} n(D) = 2

P(D) = n(D)/n(S) = 2/4 = 1/2