Atoms and Molecules Class 9 One-Shot Full Lecture + Quiz | Class 9 2021 | Triumph Series

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Atomic structure: Lecture 9

Atomic structure: Lecture 9

CBSE Class 9 Ultimate Strategy to Score 100 in Maths

A railway half ticket costs half the full fare. But the reservation charge on the half ticket is the same as that on full ticket. One reserved first class ticket for a journey between two stations is 525 and the cost of one full and one half reserved first class tickets is 850. What is the reservation charge?

In a class there are 16 boys and 9 girls. The teacher wants to select either a boy a girl as a class representative. In how many ways can the teacher make the selection?