CBSE Class 11-science Answered
1.In how many ways can the first and second prizes in mathematics and the first and second prizes in physics be awarded in a class of 25 pupils?
Asked by | 30 Mar, 2013, 06:51: PM
Expert Answer
In a class of 25 students, the first and second award can't be given to the same person, but a student who has received an award in maths can again receive the award for physics.
So, its like choosing 2 people from the class of 25 students twice and then once these students are picked, they can again be given either first or second prize. 
Answered by | 30 Mar, 2013, 08:22: PM
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