Question

in how many ways 4 boys and three girls can be seated in a row so that they are alternate

Answer 1

Answer:

144

Step-by-step explanation:

There are 4 Boys and 3 girls

There for in order to sit them alternately....

⇒ First of all we will arrange 3 girls

                         G   G   G   =  3p3 ways i.e 3*2*1 = 6

⇒ There are 4 places in order to make them sit alternately

                   °   G   °  G   °   G    °

Thus 4 Boys can be arranged in 4p4 ways i.e 4*3*2*1 = 24

Ans = 144