A contest consists of ranking `10` songs of which `6` are Indian classic and `4` are westorn songs. Number of ways of ranking so that (mention correct statements)

A contest consists of ranking 10 songs of which 6 are Indian classic and 4 are westorn songs. Number of ways of ranking so that, There are exactly 3 indian classic songs in top 5 is (5!)^(3) .

In a test paper there are 10 questions . Number of ways in which 6 questions to be answered is

In a test paper there are 10 questions . Number of ways in which 6 questions to be answered is

A class consists of 50 students out of which there are 10 girls. In the class 2 girls and 5 boys are rank holders in an examination. If a student is selected at random from the class and is found to be a rank holder, what is the probability that the student selected is a girl?

A contest consists of pedicting the results (win, draw or defeat) of 10 foot ball matches. Then the number of ways n which one entry contains at least 6 icorrect results is (A) 3^10 - sum_(r=0) ^5 .^10C_r 2^r (B) 30^10-sum_(r=1)^5 .^10C_r 2^r (C) sum_(r=0)^5 .^10C_r (D) sum_(r=6)^5 .^10C_r 3^r

The number of ways in which 7 indians and 6 pakistanies sit around a round table so that no two indians are together is

There are 10 seats in the first row of a theatre of which 4 are to be occupied. The number of ways of arranging 4 persons so that no two persons sit side by side is:

There are 10 seats in the first row of a theater of which 4 are to be occupied.The number of ways of arranging 4 person so that no two persons sit side by side is:

A letter lock consists of 4 rings each marked with 10 different letters, the number of ways in which it is possible to make an unsuccessful attempts to open the lock is