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Harpreet tosses two different coins simultaneously ( say, one is of Rs 1 and other of Rs 2 ). What is the probability that she gets at least one head ?



1 head  for rs 1 =1/1
1 head for rs 2 =1/1
total 4/4
its means no of times a head comes up by total no of times the coin is tossed
1 3 1
The outcomes favourable to the event E are  (H,H) , (H,T), (T,T).
so  the no. of outcomes favourable to E is 3.
P(E)= 3/4.
hence the probability of getting at least one head is 3/4.
2 4 2
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