If the arithmetic mean of two positive numbers a and b (a>b) is twice their G.M., then a:b is

If the letters of the word SACHIN are arranged in all possible ways and these words are written out as in dictionar...

The number of ways of distributing 8 identical balls in 3 distinct boxes so that none of the boxes remain empty is...

The number of arrangements of the letters of the word BANANA in which the two N’s do not appear adjacently is...

Number of divisors of the form 4n+2 (n> 0) of the integer 240 is...