In this task, you need to provide the correct option for a given problem on probability from the provided options.

Problem: if a coin has an equal probability of landing heads up or tails up each time it is flipped , what is the probability that the coin will land tails up exactly once in 3 consecutive flips ? 
Options: a ) 0.125 , b ) 0.375 , c ) 0.325 , d ) 0.5 , e ) 0.666
b

Problem: in how many ways 6 boys and 6 girls can be seated in a row so that boys and girls are alternate ? 
Options: a ) 1063800 , b ) 1083600 , c ) 1036800 , d ) 1053800 , e ) 1073600
c

Problem: from a pack of 52 cards , 1 card is drawn at random . what is the probability that a red card is drawn ? 
Options: a ) 1 / 2 , b ) 1 / 4 , c ) 1 / 26 , d ) 1 / 13 , e ) 5 / 13

a