When tossing two coins once, what is the probability of heads on both the coins?  Choose the correct choice:
A) 2/7
B) 3/5
C) 2/6
D) 1/4
E) 1/47
Explanation :   Total number of outcomes possible when a coin is tossed = 2   Hence, total number of outcomes possible when two coins are tossed, n(S) = 2 × 2 = 4   E = event of getting heads on both the coins = {HH}   Hence, n(E) = 1   P(E)=n(E)/n(S)=1/4   1/4
<result>D</result>
When tossing two coins once, what is the probability of heads on both the coins?