Statistics and Probability Answers

10 From the set A={3, √2, √23, √9,√7},a number is selected at random. Find the probability that is a rational number.

1/5
2/5
3
4

Giving that mean=34, median= 32 and standard deviation as 12. Calculate the Pearson's coefficient of skewness
0.1
0.4
0.5
1.6

When a die is thrown, what is the probability that the number is greater than 1, given that it is odd?
1/5
3/5
4/5
2/3

Three balls are drawn from a box containing 6 red marbles, 4 white marbles and 5 blue marbles. Find the probability that they are drawn in the order: red, white, and blue if each ball is drawn with replacement

8/225
1/225
4/225
6/225

The probability that Kodjo and Adoga pass an examination are
3/4 and 3/5 respectively. Find the probability of both boys failing the examination.
1/3
3/10
9/20
1/3

The probability that Kodjo and Adoga pass an examination are 34 and 35 respectively. Find the probability of both boys failing the examination.
1/3
3/10
9/20
1/3

The probabilities of a boy passing English and Mathematics tests are x and y respectively. Find the probability of the boy failing both tests.

1-(x-y)+xy
1-(x+y)-xy
1-(x+y)+xy
1-(x-Y)-xy

If four coins are flipped in succession, then the number of possible outcomes is…………….

8
12
16
14

In how many ways can the word "TOPO" be arranged

12 ways
15 ways
18 ways
21 ways

In how many ways can the word "HOSPITAL" be arranged?

924
120
45040
40320