Question

If n-1P2 : np₂ = 5:12 then value of n is =​

Answer 1

$= > (n - 1)p2 : np2 = 5 : 12$

$= > (n - 1) : n = 5 : 12$

$= > 12n - 12= 5n$

$= > 7n = 12$

$= > n = \frac{12}{7}$

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