instruction:
In this task, you need to provide the correct option for a given problem on probability from the provided options.
question:
Problem: there are 13 boys and 10 girls in a class . if three students are selected at random , in how many ways that 1 girl & 2 boys are selected ? 
Options: a ) 120 , b ) 480 , c ) 780 , d ) 720 , e ) 800
answer:
c


question:
Problem: in how many ways 3 boys and 3 girls can be seated in a row so that boys and girls are alternate ? 
Options: a ) 69 , b ) 70 , c ) 71 , d ) 72 , e ) 73
answer:
d


question:
Problem: a fair coin is tossed 5 times . what is the probability of getting more heads than tails in 5 tosses ? 
Options: a ) 1 / 2 , b ) 63 / 128 , c ) 4 / 7 , d ) 61 / 256 , e ) 63 / 64
answer:

a