Two unbiased coins are tossed. the probability of obtaining at least one head is:
a. 1/4
b.2/4
c.3/4
d.0
Answers
Answered by
2
When 1 coin is tossed total outcomes will be 2
when 2 coins are tossed total outcomes will be 4
when n coins are tossed total outcomes will be 2^n
Hence here total outcomes are 4 and these outcomes will be {H,H},{H.T},{T,T},{T,H}
probability for for atleast one head i.e., it may be 1 or 2 heads is 3/4
Similar questions