Question

Number of ways in which 3 boys and 3 girls (all of different height) can be arranged ina line so that boys as well as girls, among themselves, are in decreasing order of height (from left to right) is:

Answer 1

there are 20 ways  in  which 3 boys and 3 girls (all of different height) can be arranged in a line so that boys as well as girls, among themselves, are in decreasing order of height

Step-by-step explanation:

Number of ways in which 3 boys and 3 girls (all of different height) can be arranged in a line so that boys as well as girls, among themselves, are in decreasing order of height

We can take it this way we have to select 3 position of boys or girls then rest 3 positions will automatically will be fixed

as order is fixed here

hence

number of Ways = ⁶C₃

= 6!/(3!*3!)

= 20

there are 20 ways

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