Question

the mean of 20 students is marks as 150 find marks of each student​

Answer 1

Answer:

Secondary School Math 5+3 pts

Following distribution gives the marks obtained, out of 150, by the students of class IX in their class test. find the mean and mode of the data for the following: table data: marks, and no. of students: 1. 10 students got 0-25, 2. 15 students got 25-50, 3. 22 students got 50-75, 4. 30 students got 75-100, 5. 28 students got 100-125, 6. 27 students got 125-150, 7. 12 students got 150-175, 8. 6 students got 175-200 marks.

by Venkatballa9339 08.11.2019

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amitnrw

Amitnrw★ Brainly Teacher ★

Mean = 97.5 & Mode = 95 of the marks obtained, out of 150, by the students of class IX in their class test.

Step-by-step explanation:

Class Frequency Mean Class (mean -87.5/)25 freq *

0-25 10 12.5 -3 -30

25-50 15 37.5 -2 -30

50-75 22 62.5 -1 -22

75-100 30 87.5 0 0

100-125 28 112.5 1 28

125-150 27 137.5 2 54

150-175 12 162.5 3 36

175-200 6 187.5 4 24

150 60

Mean = 87.5 + 60 * 25 / 150

= 87.5 + 10

= 97.5

Mean = 97.5

Mode lies in 75 - 100

Mode = 75 + 25 *( 30 - 22) /( 2 * 30 - 22 - 28)

= 75 + 20

= 95

Mode = 95

mark as the BRAINLIEST

Answer 2

Answer:

sum of marks of all students=3000

Step-by-step explanation:

we can't find the marks of each individual student bcoz of the lack of information.

Mean= sum of all observations/total no. of observations

150=x/20

x=150×20

x=3000