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Standard XII

Mathematics

Fundamental Principle of Counting

In a shelf th...

Question

In a shelf there are $2$ different physics books and $3$ different chemistry books. The number of ways in which a student can select a physics book and chemistry book is:

6

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Solution

The correct option is A $6$
A student can select physics book and a chemistry book in $2 \times 3 = 6$ ways as explained below. Let the physics books be $P_{1}, P_{2}$ and chemistry books be $C_{1}, C_{2}, C_{3} .$
The six selections are $P_{1} C_{1}, P_{1} C_{2}, P_{1} C_{3}, P_{2} C_{1}, P_{2} C_{2}, P_{2} C_{3}$

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Fundamental Principle of Counting

Standard XII Mathematics

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In a shelf there are 2 different physics books and 3 different chemistry books. The number of ways in which a student can select a physics book and chemistry book is:

The correct option is A 6A student can select physics book and a chemistry book in 2×3=6 ways as explained below. Let the physics books be P1,P2 and chemistry books be C1,C2,C3. The six selections are P1C1,P1C2,P1C3,P2C1,P2C2,P2C3

In a shelf there are $2$ different physics books and $3$ different chemistry books. The number of ways in which a student can select a physics book and chemistry book is: