In a class, there are 18 girls and 16 boys.

Question:

In a class, there are 18 girls and 16 boys. The class teacher wants to choose one pupil for class monitor. What she does, she writes the name of each pupil on a card and puts them into a basket and mixes thoroughly. A child is asked to pick one card from the basket. What is the probability that the name written on the card is:

(i) the name of a girl

(ii) the name of a boy?

Solution:

GIVEN: In a class there are 18 girls and 16 boys, the class teacher wants to choose one name. The class teacher writes all pupils name on a card and puts them in basket and mixes well thoroughly .A child picks one card

TO FIND: The probability that the name written on the card is

(i) The name of a girl

(ii) The name of a boy

Total number of students in the class 

(i) Total numbers of girls are 18 hence favorable cases are 18

We know that PROBABILITY = 

Hence probability of getting a name of girl on the card picked = 

(ii) Total numbers of boys are 16 hence favorable cases are 16

We know that PROBABILITY = 

Hence probability of getting a name of boy on the card picked = 

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