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Grade Upto college level Algebra

6 boys and 6 girls sit in a row at random. Find the probability that 1) The six girls sit together 2) The boys and girls sit alternatively.

Profile image of Manvendra Singh chahar
12 Years agoGrade Upto college level
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1 Answer

Profile image of SHAIK AASIF AHAMED
12 Years ago
Hello student,
P(group of girls)
= 7!6! / (6+6)!
= 7!6! / 12!
= 6*5*4*3*2*1 / 12*11*10*9*8
= 1/132
P(alternately)
= 2 * 6!6! / 12!
= 1/462
Thanks and Regards
Shaik Aasif
askIITians faculty

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