Question

There are 5 routes to go from allahabad to patna and 4 ways to go from patna to kolkata, then how many ways are possible for going from allahabad to kolkata via patna?

Answer 1

This is rather a simple question to answer . as you are talking about ways to allahabad to kolkata then only the ways from allahabad will be counted here. As the patna ways to kolkata are 4 and allahabad to patna ways are 5 So, in order to travel from allahbad to kolkata there will be only 5 routes to go. Because the direct ways will only be counted here. hope this will help you

Answer 2

Answer:

20

Step-by-step explanation:

allahabad ------1----> Patna -----1----->kolkata

allahabad ------2----> Patna -----2----->kolkata

allahabad ------3----> Patna -----3----->kolkata

allahabad ------4----> Patna -----4----->kolkata

allahabad ------5----> Patna.

in 5 ways we go through 1st route from patna to Kolkata

in 5 ways we go through 2nd route from patna to Kolkata

in 5 ways we go through 3rd route from patna to Kolkata

in 5 ways we go through 4th route from patna to Kolkata.

therefore 5*4 = 20 / 5+5+5+5 = 20