Question

A random draw is being designed for 210 participants. A single winner is to be chosen, and all the participants must have an equal probability of winning. If the winner is to be drawn using 10 balls numbered 0 through 9, how many balls need to be picked, regardless of order, so that each of the 210 participants can be assigned a unique set of numbers?


a-10
b-6
c-5
d-4

Answer 1

So we're looking for \(\large \frac{x}{10}\)

Answer 2

Okay, \(10\times 10=100\).. This is one of those questions where they're not asking for the right answer, they want the answer they think is right.

Answer 3

Oh! Wait, they mean how many combinations of \(x\times 10\)

Answer 4

100*

Answer 5

yeah thankssss

Answer 6

I'd say B, six.

Answer 7

4 balls are required

Answer 8

is it correct