Permatuation and combination problem, Mathematics

Assignment Help:

4 boys and 4 girls are to seated in arow

i)no. of girls sit together

ii)not all girls sit together

iii)boys and girls are altenate to each other

iv)if a particular boy and girl are a couple find no. of ways they are never together

v)in how many ways 4 boys and 4 girls can be seated in alternate arrangement manner

Solution:)
1.⁵P₅*⁴P₄

2.⁸P₈-⁵P₅*⁴P₄

3.2*⁴P₄*⁴P₄

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