How many ways can 6 people be chosen and arranged in a straight line if there are 8 people to choose from? 720 20,160 40,320 48?
2 answers:
The number of permutations of 8 people taken 6 at a time is given by:
Answer: 28ways
Step-by-step explanation:
This has to do with selection i.e selecting 6people from pool of 8 people
Since combination have to do with selection, the selection can be done I'm 8C6 ways
Generally, nCr = n!/(n-r)!r!
8C6 = 8!/(8-6)!6!
= 8!/2!6!
= 8×7 × 6!/2!6!
= 8×7/2!
= 56/2
= 28ways
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