Six identical coins are arranged in a row. The total number of ways in which the number of heads is equal to the number of tails is

2nd idetical coins are arrangeed in a row and the number of ways in which the number of heads is equal to the nuber of tails is 70, then n= (A) 4 (B) 5 (C) 3 (D) none of these

2nd idetical coins are arrangeed in a row and the number of ways in which the number of heads is equal to the nuber of tails is 70, then n= (A) 4 (B) 5 (C) 3 (D) none of these

6 identical coins are arranged on a row the number of arrangements in which 4 are heads and 2 are tails is

In an auditorium, seats are arranged in rows and columns. The number of rows were equal to the number of seats in each row. When the number of rows were doubled and the number of seats in each row was reduced by 10, the total number of seats increased by 300. How many number of rows are there in the original arrangement?

In an auditorium, seats are arranged in rows and columns. The number of rows were equal to the number of seats in each row. When the number of rows were doubled and the number of seats in each row was reduced by 10, the total number of seats increased by 300. How many number of seats are there in the auditorium after re-arrangement.

In an auditorium, seats are arranged in rows and columns. The number of rows were equal to the number of seats in each row. When the number of rows were doubled and the number of seats in each row was reduced by 10, the total number of seats increased by 300. How many number of seats are there in the auditorium in original arrangement ?

In an auditorium, seats are arranged in rows and columns. The number of rows were equal to the number of seats in each row. When the number of rows were doubled and the number of seats in each row was reduced by 10, the total number of seats increased by 300. How many number of columns are there in the auditorium after re-arrangement?