Answer:
Step-by-step explanation:
1)3.141592 either because Pi is unknown or it is non-terminating.
However, in cbse it is considered irrational so pick it
2)5/11 This is easy you should know simple division.
Hope this helps :)
In an observational study, only one group is studied, and in an expirement, two groups are studied.
<u>Given</u>:
Given that there are 10 marbles in a bag. 4 are blue, 3 are black, 2 are white and 1 is red.
The marbles are selected by not replacing the drawn ones.
We need to the probability of selected a black marble and then a white marble without replacement.
<u>Probability</u>:
Let B denote the black marble.
Let W denote the white marble.
The probability of selecting a black marble is 
The probability of selecting a white marble without replacement is 
The probability of selecting a black marble and then a white marble without replacement is given by

Substituting the values, we get;



Thus, the probability of selecting a black marble and then a white marble without replacement is 
Answer:
a study of the popularity of a particular music genre, with a small standard deviation about the mean
a study with a significantly larger than expected standard deviation about the sample mean
Step-by-step explanation: