Two numbers a, b are chosen from the set of integers 1, 2, 3, …, 39. Then probability that the equation 7a - 9b = 0 is satisfied is

Two numbers a ,b are chosen from the set of integers 1, ,2 3, ..., 39. Then probability that he equation 7a-9b=0 is satisfied is 1//247 b. 2//247 c. 4//741 d. 5//741

Two number aa n db aer chosen at random from the set of first 30 natural numbers. Find the probability that a^2-b^2 is divisible by 3.

Two distinct numbers a and b are chosen randomly from the set {2,2^(2),2^(3),….2^(25)} . Then the probability that log_(a)b is an integer is

If two distinct numbers m and n are chosen at random form the set {1, 2, 3, …, 100}, then find the probability that 2^(m) + 2^(n) + 1 is divisible by 3.

A number is selected from the set {1, 2, 3,.., 20} . The probability That the selected number is divisible by 3 or 4 is

Two numbers x and y are chosen at random (without replacement) from among the numbers 1,2,3,2004. The probability that x^3+y^3 is divisible by 3 is (a) 1/3 (b) 2/3 (c) 1/6 (d) 1/4