7. Example problem VII

There are $40$ students in Class X of a school of whom $25$ are girls and $15$ are boys. The class teacher has to select one student as a class representative. She writes the name of each student on a separate card, the cards being identical. Then she puts cards in a bag and stirs them thoroughly. She then draws one card from the bag. What is the probability that the name written on the card is the name of

 

(i) a girl $=$

 

(ii) a boy $=$