There are 40 students in class X of a school of whom 25 are girls, and

1.	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 the cards in a bag and mixes them thoroughly. She then draws one card from the bag. What is the probability that the name is written on the card is the name of (i) a girl? (ii) a boy?
Answer» Sample Space = 40 Number of Girls = 25 Number of Boys = 15 (i) P(a girl) = 25/40 (ii) P(a boy) = 15/40

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 the cards in a bag and mixes them thoroughly. She then draws one card from the bag. What is the probability that the name is written on the card is the name of (i) a girl? (ii) a boy?

Answer»

Sample Space = 40

Number of Girls = 25

Number of Boys = 15

(i) P(a girl) = 25/40

(ii) P(a boy) = 15/40

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