The mean of marks secured by 55 students in division A of class X is 58, 45 students of division B is 54 and that of 75 students of division C is 52. - Quantitative Aptitude MCQ SSC CGL 2026 | ExamTest.live | ExamTest.live

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The mean of marks secured by 55 students in division A of class X is 58, 45 students of division B is 54 and that of 75 students of division C is 52. Find the mean of marks of the students of three divisions of Class X.

A $53.7$
B $54.4$
C $53$
D $55.8$

Solution & Step-by-step Explanation

To find the combined mean, we calculate the total marks of all students across all three divisions and divide by the total number of students. Total marks = (55 \times 58) + (45 \times 54) + (75 \times 52) Total marks = 3190 + 2430 + 3900 = 9520 Total number of students = 55 + 45 + 75 = 175 Combined Mean = \frac{9520}{175} = 54.4 Therefore, the mean marks of all the students combined is 54.4.

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The mean of marks secured by 55 students in division A of class X is 58, 45 students of division B is 54 and that of 75 students of division C is 52. Find the mean of marks of the students of three divisions of Class X.

A

53.7

B

54.4

C

53

D

55.8

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