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Answered

How many different signals, each consisting of 10 flags hung in vertical line, can be formed from 4 red flags, 3 blue flags and 3 green flags? *​.

Sagot :

SILENTTYPEGIRLIN

10! /4! • 3! • 3!

expand the expression:

10 × 9 × 8 × 7 × 6 × 5 × 4!/ 4 × 3 × 3!

reduce the fraction:

= 4200

So, 4200 different signals can be formed from 10 flags hung in vertical line.

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