Question

How many differnt flags with 3 stripes are possible, using the colours red (R), blue (B) and yellow (Y)? Each colour can be used obly once in each flag.

Answer 1

6 flags

Explanation:

The flag must have stripes of 3 different colors.

Ways to arrange each stripe :

• Stripe 1 = 3
• Stripe 2 = 3 - 1 = 2
• Stripe 3 = 1

Stripe 1 x Stripe 2 x Stripe 3

• 3 x 2 x 1
• 6 flags

Answer 2

6

Explanation:

3 x 2 x 1

first strip you can have 3 options

second only 2 options left

last one, only 1 choice

RBY

RYB

BRY

BYR

YRB

YBR