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03 Mar 2022, 09:45
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
71% (01:22) correct
29%
(01:46)
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Seven people enter a race. There are 4 types of medals. Winner - platinum, runner up - gold, next two racers - silver and the last 3 - bronze. Ways to do it?
A. \(\frac{7!}{3!}\)
B. \(\frac{7!}{2!3!}\)
C. \(1*1*2!*3!\)
D. \(7*6*2!*3!\)
E. \(7*6*5*4\)
A. \(\frac{7!}{3!}\)
B. \(\frac{7!}{2!3!}\)
C. \(1*1*2!*3!\)
D. \(7*6*2!*3!\)
E. \(7*6*5*4\)
03 Mar 2022, 10:05
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Winner - platinum (P), runner up - gold (G), next two racers - silver (S) and the last 3 - bronze (B).
This scenario would be same as number of words that can be formed by rearranging letters of a word PGSSBBB
= \(\frac{7! }{ 2!*3!}\)
Answer: B
This scenario would be same as number of words that can be formed by rearranging letters of a word PGSSBBB
= \(\frac{7! }{ 2!*3!}\)
Answer: B
03 Mar 2022, 10:07
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Bunuel
Seven people enter a race. There are 4 types of medals. Winner - platinum, runner up - gold, next two racers - silver and the last 3 - bronze. Ways to do it?
A. \(\frac{7!}{3!}\)
B. \(\frac{7!}{2!3!}\)
C. \(1*1*2!*3!\)
D. \(7*6*2!*3!\)
E. \(7*6*5*4\)
A. \(\frac{7!}{3!}\)
B. \(\frac{7!}{2!3!}\)
C. \(1*1*2!*3!\)
D. \(7*6*2!*3!\)
E. \(7*6*5*4\)
P, G - 2 , B - 3 , Total = 7
Must be \(\frac{7!}{2!3!}\), Answer is (B)
