Basically, questions like these would be opposite; find the number that when multiplied by each other equals 49.
Just find the square root of 49.

So,

Our answer is 7.
Answer:
1/11
Step-by-step explanation:
If there are 11 counters and there's only 1 white one, that makes it to where there's only a 1 in 11 chance of you choosing that one white counter.
19/2 = 9.5. Hope this helped.