2/9 chances of getting a yellow because 4 + 3 + 2 is 9 and there is 2 yellow marbles in the bag.
I am to believe that his score was 70.
since mike scored 15 less than 85 i had suspected it was 70
Answer:
y=mx+b
Step-by-step explanation:
mark brainliest
Answer:
Stratified sampling
Step-by-step explanation:
Samples may be classified as:
Convenient: Sample drawn from a conveniently available pool.
Random: Basically, put all the options into a hat and drawn some of them.
Systematic: Every kth element is taken. For example, you want to survey something on the street, you interview every 5th person, for example.
Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed.
Stratified: Also divides the population into groups. However, then only some elements of the group are surveyed.
In this question:
Population divided into groups, and random samples are drawn from the groups. This is a mark of stratified sampling.
