When sampling without replacement, the probability of obtaining a certain sample is best given by a:

a. hypergeometric distribution

b. binomial distribution

c. poisson distribution

d. normal distribution

Hypergeometric distribution

Step-by-step explanation:

the hypergeometric distribution is a probability distribution that is discrete. It  describes the probability of  success without replacement, from a finite number of objects.

Hypergeometric distribution  is used for relatively small population without replacements.

your answer would be 10x - 1

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have