Two coins are tossed 400 times and we get
Two heads:112 times; one head 160 times ;0 times; 0 head :128 times.
When two coins are tossed at random, what is the probability of getting
(i) 2 heads? (ii) 1 heads? (iii) 0 head?
Total number times coin tossed: 400
Number of times Two heads occurred: 112
Number of times One head occurred: 160
Number of times No head (zero head) occurred: 128
Probability P()= 
(i). Let p(H1) be probability of getting Two heads
P (H1) = 
P (H1) = 
= 0.28
(ii). Let p(H2) be probability of getting One head
P (H2) = 
P (H2) = 
= 0.4
(iii). Let p(H3) be probability of getting No head
P (H3) = 
P (H3) = 
= 0.32
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