Write a heart for certain to happen,a happy face for equally likely to happen,and a sad face for impossible to happen

1.From a class of 15 boys and 15 girlswhat is the probability that a boy is chosen as the leader?

2.withoyt looking, what is the probability that a blue marble is drawn from a box of blue marble?

PSAGOT PO PLEASE,KUNG POINTS LANG HABOL NYO PLEASE WAG NYO NA SAGUTIN ​