Question

How many ways you can select two numbers till 50,which will their product as a multiple of 3?

Answer 1

is that between 1and 50

Answer 2

yue.

Answer 3

it has to be keenan
mutibles of 50 not divisors

Answer 4

ok

Answer 5

for example - 1*3 =3
5*3=15 ...all in multiple of 3.

Answer 6

the number should be betwwen 1 and 50

Answer 7

15 times

Answer 8

To get a two factor product out of 50 numbers ,we can choose the two number in 50C2ways.
which we need to negate the pairs where in both numbers are not multiple of 3.
Non multiple of 3 till 50 = 50 - 50/3 Approx equal to 34
Ans :- 50C2 - 34C2