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Seven athletes are participating in a ra...

Seven athletes are participating in a race. In how many ways can the first three athletes win the prizes ?

Text Solution

Verified by Experts

It is equivalent to filling 3 places (as prizes) with 7 persons.
The number of permutations of 7 objects taken 3 at a time is
`.^(7)P_(3)=7xx6xx5=210`
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