Qualification > Math
S1 and S2 DOUBTS HERE!!!!
astarmathsandphysics:
7/(2!3!2!)
6/(7/(2!3!2!))
silvercameron:
--- Quote from: astarmathsandphysics on February 19, 2012, 12:17:48 pm ---7/(2!3!2!)
6/(7/(2!3!2!))
--- End quote ---
thankyou for answering the question but the book answers given in the book are, 210 and 2/7.
And i got a couple of more doubts:
Q) 6 people are going to travel in a six-seater minibus but only 3 of them can drive. In how many diffrent ways can they seat themselves?
Q) 10 people travel in 2 cars, a saloon and a mini. If the saloon has seats for six and the mini has seats for 4, find the number of different ways the party can travel, assuming that the order of seating in each car does not matter and all the people can drive.
astarmathsandphysics:
should be 7!/(2!3!2!) and 6/(7!(2!3!2!))
1. first pick the driver - choice of three and the remaining 5 can sit in 5! ways so 3*5!
2.10!/(4!6!)
silvercameron:
thankyou sir, got it.
astarmathsandphysics:
good go see the tests here on my website.
Putting up two good tests every day now
http://www.astarmathsandphysics.com/test_centre/
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