Question

60 students sat a mathematics exam.The mean mark for the 32 students in class A was 55.The mean mark for the 28 students in class B was 52. Find the mean mark for all 60 students

Answer 1

53.6

Explanation:

• To find the mean mark for all 60 students, you can calculate it like this:

• Multiply the mean mark for class A (55) by the number of students in class A (32):

55 × 32 = 1760

• Multiply the mean mark for class B (52) by the number of students in class B (28):

52 × 28 = 1456

• Add the total marks for class A and class B:

1760 + 1456 = 3216

• Divide the total marks (3216) by the total number of students (60):

3216 / 60 = 53.6

So, the mean mark for all 60 students is 53.6.