The number of ways of selecting 3-member subset of `{1,2,3,..., 25}` so that the numbers form a G.P.with integer common ratio is

If 2lamda is the number of ways of selecting 3 member subset of {1,2,3, . .,29}, so that the number form of a GP with integer common ratio, then find the value of lamda

If 2lamda is the number of ways of selecting 3 member subset of {1,2,3, . .,29}, so that the number form of a GP with integer common ratio, then find the value of lamda

If 2lamda is the number of ways of selecting 3 member subset of {1,2,3, . .,29}, so that the number form of a GP with integer common ratio, then find the value of lamda

If 2lamda is the number of ways of selecting 3 member subset of {1,2,3, . .,29}, so that the number form of a GP with integer common ration, then the value of lamda is

If 2lamda is the number of ways of selecting 3 member subset of {1,2,3, . .,29}, so that the number form of a GP with integer common ration, then the value of lamda is

Total number of ways of selecting two numbers from the set {1,2,3,...,90} so that their sum is divisible by 3, is

the total number of ways of selecting two number from the set {1,2,3,4,…..3n} so that their sum divisible by 3 is equal to -