Statistics and Probability Answers

the probability of a boy passing english and mathematics tests are a and b respectively. find the probability of the boy falling both tests

Three bags each contain four balls bag 1 has three red balls and one blue ball bag 2 has four red balls bag three has two red balls and two blue balls.
How many different outcomes are there?

At a particular restaurant, % of all customers order an appetizer and % of all customers order dessert. If % of all customers order an appetizer or dessert (or both), what is the probability a randomly selected customer orders both an appetizer and dessert?

The mean of seven numbers is 10. If six of the numbers are 2, 4, 8, 14, 16, & 18, find the mode
14
5
9
8

an automatic gate has a 95% chance of working on any particular day. Find the probability that it will be working on at least one of the next two days

Tim Bleckie is the owner of Bleckie Investment and Real Estate Company. The company recently purchased four tracts of land in Holly Farms Estates and six tracts in Newburg Woods. The tracts are all equally desirable and sell for about the same amount. What is the probability that of the next four sold at least one will be in Holly Farms?

how to put inequilities in class interval with these numbers
18.7
19.3
15.9
17.5
19.4
20.9
17.3
19.7
15.8
15
17.2
21.6
21.8
17.4
17
22
15.6
19.4
16.5
25.5
15.9
16.2
18.2
17.5

Consider a Poisson distribution with a mean of two occurrences per time period.
a. Write the appropriate Poisson probability function.
b. What is the expected number of occurrences in three time periods?
c. Write the appropriate Poisson probability function to determine the probability of x
occurrences in three time periods.
d. Compute the probability of two occurrences in one time period.
e. Compute the probability of six occurrences in three time periods.
f. Compute the probability of five occurrences in two time periods.

The mean and range of the set of numbers 1.20, 1.00, 0.90, 1.40, 0.80, 0.80, 1.20 & 1.10 are m and r respectively. find m+r
1.69
1.68
1.67
1.66

The score of 5 students in an examination are 6, 5, 8, 7 & 4 find the variance
3
2
2.5
4.5

The mean of four number is 5 and the mean deviation is 3. find the fourth number if the mean deviation of the first three number is 2
12
20
11
15

The mean of seven numbers is 10. If six of the numbers are 2, 4, 8, 14, 16 & 18 find the mode
14
5
9
8

The following are graphical presentation except
chart
none of the above
pictogram
bar chart

A __________ is the total collection of all the possible outcomes of an experment
sample space
sample
experiment
statistics