All possible two factor product are formed from the numbers 1,2 100 the number of factors - Maths - Permutations and Combinations

Question

All possible two factor product are formed from the numbers 1,2 100
the number of factors out of the total obtained from the multiples
of 3

Rohit · Answer

Two Factor products which are Multiples of 3=(total two
factor products)-(two factor products of non multiples of
3)

Total two factor products=100c2 (any two numbers selected from
100)
Two factor products of non multiples of 3=67c2 (there are 33
multiples of 3 below 100)
Final answer=100c2 - 67c2=2739

All possible two factor product are formed from the numbers 1,2....100 .the number of factors out of the total obtained from the multiples of 3 .