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Beyond Horizon Set 3 Paper 1 · Q7

Paper 1Algebra

Three boys of class I, 44 boys of class II and 55 boys of class III sit in a row. The number of ways they can sit, so that boys of the same class sit together is

A3!4!5!3!4!5!
B(12)!3!4!5!\dfrac{(12)!}{3!4!5!}
C(3!)24!5!(3!)^24!5!
D3×4!5!3\times4!5!
E(4!)25!6!(4!)^25!6!
F3!(4!)25!3!(4!)^25!

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