Question Library

If a fair coin is tossed 3 times, what is the probability of getting at least two heads?

Score (x) 0 1 2 3 4 5 6 Freq (f) 5 7 3 7 11 6 7 Find the mean of the data.

Score (x) 0 1 2 3 4 5 6 Freq (f) 5 7 3 7 11 6 7 Find the variance

The probabilities that John and James pass an examination are \(\frac {3}{4}\)and \(\frac {3}{5}\) respectively. Find the probability of both boys failing the examination.

The table shown gives the marks scored by a group of student in a test. Use the table to answer the question given. Mark 0 1 2 3 4 5 Frequency 1 2 7 5 4 3 What is the median mark?

The table shown gives the marks scored by a group of student in a test. Use the table to answer the question given. Mark 0 1 2 3 4 5 Frequency 1 2 7 5 4 3 What is the probability of selecting a student from the group that scored 2 or 3

The table above shows the frequency of children age x years in a hospital x 1 2 3 4 5 6 7 8 y 3 4 5 6 7 6 5 4 How many children are in the hospital

What is the modal age?

A box contains two red balls and four blue balls. A ball is drawn at random from the box and then replaced before a second ball is drawn. Find the probability of drawing two red balls.

The mean of 1, 3, 5, 7 and x is 4. Find the value of x

The table shows the distribution of goals scored by 25 teams in a football competition. Calculate the probability that a team selected at randon scored either 4 or 7 goals.

The table shows the distribution of goals scored by 25 teams in a football competition. Calculate the probability that a team selected at random scored at most 3 goals.

Find the median of 2, 1, 0, 3, 1, 1, 4, 0, 1 and 2

Find the mean deviation of 20, 30, 25, 40, 35, 50, 45, 40, 20 and 45

If X, Y can take values from the set (1, 2, 3 ,4), find the probability that the product of X and Y is not greater than 6