Question

The marks (out of 10) obtained by 28 students in the Mathematics test are listed as below:- 8, 1, 2, 6, 5, 5, 5, 0, 1, 9, 7, 8, 0, 4, 8,7, 3, 0, 8, 10, 10, 3, 4, 8, 7, 8, 9, 2 The number of students who obtained marks more than or equal to 5 is​

Answer 1

Answer:

17

Step-by-step explanation:

total students=28

number of students who obtained

5 marks=3

6 marks=1

7 marks=3

8 marks=6

9 marks=2

10 marks=2

so, the number of students who obtained marks more than Or equal to 5 is 17

Answer 2

☯️ Answer :

Therefore ,

• 17 students obtained 5 or more than 5 marks in a Mathematics test.

❍ Solution :-

Given :

Marks of 28 students are given . The number are out of 10 . Now the data is given :-

8, 1, 2, 6, 5, 5, 5, 0, 1, 9, 7, 8, 0, 4, 8, 7, 3, 0, 8, 10, 10, 3, 4, 8, 7, 8, 9, 2 .

Let's first calculate that each number is got by how many students from (1 - 10) . In ascending order ,

• 0 ➸ 3 students.
• 1 ➸ 2 students.
• 2 ➸ 2 students.
• 3 ➸ 2 students.
• 4 ➸ 2 students.
• 5 ➸ 3 students.
• 6 ➸ 1 students.
• 7 ➸ 3 students.
• 8 ➸ 6 students.
• 9 ➸ 2 students.
• 10 ➸ 2 students.

✿ Hence ,

Now , you can calculate just to check that 28 students are there in the above sequence or not .

Find :

• How many students obtained marks equal to 5 or more than it .

Now , from this we can just easily find out how many students got more than or equal to  5 .

So,  Let's find :-

• 5 ➸ 3 students.
• 6 ➸ 1 students.
• 7 ➸ 3 students.
• 8 ➸ 6 students.
• 9 ➸ 2 students.
• 10 ➸ 2 students.

Adding this up ,

$\dashrightarrow\rm \: 3 + 1 + 3 + 6 + 2 + 2$

$\dashrightarrow\rm \: \bf \: 17 \: \: \star$

• Therefore , 17 students have got more than 5 or equal to 5 out of 28 students in a mathematics test.

Also , we can say that

• Therefore , 11 students have got less than 5 out of 28 students in a mathematics test.

✡ Additional Information :-

• Each entry in the above list is an observation.
• Collection of this observation is the raw data.
• Here , no. of children are the variable (it may vary) . And , the number from (1 to 10) is the variates .
• The given data is very difficult to interpret if we had not arranged the above data in ascending or descending order .
• The data arranged in This form is called data array or arrayed data.
• This sums are from the chapter ➢ Data Handling .
• Here , we can also represent it in tally marks .
• Bar graphs of grouped data are called Histograms .
• Probability of an event E ,written as P(E)
• $\boxed{\rm \bf\:\pink{P(E) }= \dfrac\green{{Number\:of\:outcomes\:favourable\:to\:E}}\green{{Total\:Number\:of\:outcomes\:of \:the \: Experiment}}}\:\star$
• An event which always happens is called a sure event or certain event.
• An event which never happens is called an impossible event .

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