Design

• The "mode" is the value that occurs most often. If no number is repeated, then there

is no mode for the list• For example if we have to find the mode of

the following series-• 13, 18, 13, 14, 13, 16, 14, 21, 13

• . The mode is the number that is repeated more often than any other, so 13 is the

mode.

• Median is the middle value of the given numbers or distribution in their ascending order. Median is

the average value of the two middle elements when the size of the distribution is even.

Example 1: To find the median of 4,5,7,2,1 Example 1: To find the median of 4,5,7,2,1 [ODD].[ODD].            Step 1:Step 1: Count the total numbers given. Count the total numbers given.          There are 5 elements or numbers in           There are 5 elements or numbers in the distributionthe distributionStep 2:Step 2: Arrange the numbers in ascending Arrange the numbers in ascending order.order.          1,2,4,5,7          1,2,4,5,7Step 3:Step 3: The total elements in the The total elements in the distribution (5) is odd.distribution (5) is odd.          The middle position can be           The middle position can be calculated using the formula. (n+1)/2 calculated using the formula. (n+1)/2           So the middle position is (5+1)/2 =           So the middle position is (5+1)/2 = 6/2 = 3 6/2 = 3           The number at 3rd position is =           The number at 3rd position is = Median = 4Median = 4

0

2

4

6

8

10

JISBIN DEV SUCHIT MOHIT

MARKS

MARKS

• Probability is the chance that something will happen - how likely it is that some event will

happen.

Sometimes you can measure a probability with a number: "10% chance of rain", or you can use

words such as impossible, unlikely, possible, even chance, likely and certain. 

Example: "It is unlikely to rain tomorrow".

• Problem:  A spinner has 4 equal sectors colored yellow, blue, green and red. What are the

chances of landing on blue after spinning the spinner? What are the chances of landing on red.

•  Solution:  The chances of landing on blue are 1 in 4, or one fourth. The chances of landing on red

are 1 in 4, or one fourth• This problem asked us to find some probabilities

involving a spinner.

• In probability, we talk about events" and outcomes." An event is anything that happens. An outcome for example, can have two possible results -- heads or tails. When you flip a coin (an event), the result (outcome) is either heads

or tails.• Probability tells you which outcome -- heads or tails -- is more likely to occur in any given event. You can determine

the probability of a particular outcome by dividing the number of times that the outcome has occurred by the

total number of events. To find the probability that a flipped coin will come up heads, for example, you might flip the

coin 25 times. If the coin turns up heads 10 times, then the probability that the coin will land heads up on the next flip

is 10/25, or 2/5.