A number n is chosen at random from (1,2,3,4,…….1000). The probability that n is a number that leaves remainder 1 when divided by 7 is

A number n is chosen at random from {1,2,3,..,1000}. The probability that n is a number which leaves a remainder 1 when divided by 7, is

A number n is chosen at random from {1,2,3,..,1000}. The probability that n is a number which leaves a remainder 1 when divided by 7, is

is the least number leaves remainder 1when divided by 2,3,4,5,6,7,8,9,10

A number x is chosen at random from the numbers -3,-2,-1,0,1,2,3 the probability that |x|<2 is

An integer is chosen at random from the numbers 1, 2, ....., 25. The probability that the chosen number is divisible by 3 or 4, is

Two numbers a and b are chosen at random from the set {1,2,3,..,5n}. The probability that a^(4)-b^(4) is divisible by 5, is