the probability of a student passing a math test is 70%. what are the odds against his passing the test?

The probability of a student passing a math test is 70%. What are the odds against his passing the test? => 1 3 or 1 7 or 4 7 or 3 7..

If the odds are a:b in favour of A then This is the same as odds are b:a against the event ..

Conditional Probability - Let us consider the random experiment of throwing a die. Let A be the event of getting an odd number on the die. \ S = {1, 2, 3, 4, 5, 6} and A = {1, 3, 5} Let B = {2, 3, 4, 5, 6}. If, after the die is thrown, we are given the information, that the even..

A set of observations is called a called a collection of data. These observations should possess some common characteristics. They are recorded and used for further study. The quantities such as age, height and number of students are called variable..

Question: Find the median of : 15, 8, 14, 20, 13, 12, 16. Answer: 8, 12, 13, 14, 15, 16, 20 n = 7 (odd) Median = 1..

The number which tells us how many times a particular data appears is called the frequency. For example, 2 marks have been scored by five students which means marks 2 occurs five times. Therefore, the frequency of score 2 is five. Similarly, the frequency of marks 5 is three because t..

The collection of data, its classification, tabulation and study is called Statistics. Consider the marks obtained (out of 20) in the inter-school talent contest by the students of a school. Jasmine 18 Chandresh 18 Phiroza 17 Darvish 19 Sarabjit 19 Gaurav 15 Sejal 17 Sajid 16 Pooja 16 Sau..

So far, we have assumed that the elementary events are equally likely and we have used the corresponding definition of probability. However the same definition of conditional probability can also be used when the elementary events are not equally likely. This will be clear from..

Cumulative frequency is obtained by adding the frequency of a class interval and the frequencies of the preceding intervals upto that class interval. This is explained by an example below. The following frequency distribution table gives the marks obtained by 40 students: Table (a) The fr..

A teacher gave a test to a class of 26 students. The maximum mark is 5. The marks obtained by the pupils are: Such data as above is called ungrouped (or raw) data. We may arrange the marks in ascending or descending order. The data so represented is called an array. The differen..