Question

3. There are 5 routes from station A to station B and 4 routes from station B to C. Answer the questions

Answer 1

Answer:

a)

A to B  5 routes and B to C  4 routes

Total options:

• 5*4 = 20

b)

A to C, 20 ways as above calculation.

C to A, 20 ways as well.

Total options:

• 20 * 20 = 400

c)

A to C, 20 ways

Return to A with different ways:

• (5 - 1)(4 - 1) = 4*3 = 12

Total options:

• 20 * 12 = 240