Question

in how many different ways number of ways 4boys and 3 girls can sit on bench such that girls always sit together

Answer 1

answer is 4920 .......

Answer 2

Answer:

720 ways

Step-by-step explanation:

There are 4 boys and 3 girls. So there are total 4 + 3 = 7 persons.

Now, the condition is 3 girls always sit together. Whatever comes together we  consider it as a single unit. Hence, we can assume 3 girls as a single unit.

Hence, we have to arrange total 5 persons.

5 person can be arranged in 5! = 120 ways.

And the three girls can be arranged themselves in 3! = 6 ways.

Therefore, the number of ways is given by

120 × 6

= 720 ways