Question

The marks in a test for a group of students are as follows. Find the mean marks of these students
Marks
010
10 – 2020 - 30.30 - 40 40 – 50 50 – 60 60 - 70
No. of students
3
5
12
16
11
5
4​

Answer 1

Step-by-step explanation:

X. f. m. fm

10-20. 3. 15. 45

20-30. 5. 25. 125

30-40. 12. 35. 420

40-50. 16. 45. 720

50-60. 11. 55. 605

60-70:. 5. 65. 325

70-80. 4. 75. 300

sum of FM= 2540

sum of f = 56

mean = 2540/56

= 45.35

hope it helps .

mark it brainliest please bro

Answer 2

Answer:

hey mate..!

here's your ans.. ☝

I hope it helps you very well

Thanks for follow me.. ❣