arithmetic - suppose you can travel from a place m to a place n by 3 buses from place n to place o by 4 buses from place o to place p by 2 buses and from place p to place q by 3 buses in how many ways can you travel from m to q - skillgun

The bus from M to N can be selected in 3 ways.
The bus from N to O can be selected in 4 ways.
The bus from O to P can be selected in 2 ways.
The bus from P to Q can be selected in 3 ways.
So, by the General Counting Principle, one can travel from M to Q in 3*4*2*3= 72 ways