Find the probability of selecting 2 green balls out of 4 green and 3 red balls

Find the probability of selecting 2 green balls out of 4 green and 3 red balls.
a) 6/7
b) 4/7
c) 3/7
d) 2/7
Sol:

Find the probability of selecting 2 green balls out of 4 green and 3 red balls.
a) 6/7
b) 4/7
c) 3/7
d) 2/7
Sol: