Assume a number related class contains 38 understudies. There are 20 females (three of whom communicate in Spanish) and 18 guys (five of whom communicate in Spanish). Offer all responses as decimals to at any rate two decimal spots.

1. What is the likelihood that an arbitrarily chosen understudy communicates in Spanish, given that the understudy is female?

2. What is the likelihood that a haphazardly chosen understudy doesn't communicate in Spanish, given that the understudy is male?

3. What percent of Spanish talking understudies are male?

4. In the event that somebody doesn't communicate in Spanish what is the likelihood they are female?

A urn contains 2 dark and 5 earthy colored marbles. A marble is chosen aimlessly. On the off chance that the marble drawn is earthy colored, it is supplanted and 2 extra earthy colored marbles are likewise placed into the urn. In the event that the marble drawn is dark, it isn't supplanted in the urn and no extra marbles are added. A marble is then drawn from the urn the subsequent time.

The two-stage explore portrayed in Exercise 2.6.9 was performed (depicted above) Probability earthy colored marble is picked the second time= 50/63

We are given that the marble chose at the subsequent stage was earthy colored. What is the likelihood that the marble chosen at the principal stage was additionally earthy colored?

As indicated by an investigation by the Pew Research Center, 15% of grown-ups in the United States don't utilize the Internet (Pew Research Center site, December, 15, 2014). Assume that 10 grown-ups in the United States are chosen arbitrarily.

(15)

a. Is the determination of the 10 grown-ups a binomial investigation? Clarify.

b. What is the likelihood that none of the grown-ups utilize the Internet?

c. What is the likelihood that 3 of the grown-ups utilize the Internet?

d. What is the likelihood that at any rate 1 of the grown-ups utilizes the Internet?

The accompanying table shows the quantity of individuals that are either 18, 19, 20 or 21 years of age, from an example of 258 individuals.

a) Complete the table.

Age Number of individuals

18 54

19 69

20 70

21

(b Find the mean for this example. Offer your response to in any event 2 decimal spots.

(c Find the standard deviation for this example. Offer your response to at any rate 2 decimal spots.