The mean marks of 35 students of a class are 40. Find the sum of their marks.
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Answer:
Hi friend
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Your answer
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Mean mark obtained by 25 students = 35
Sum of the marks of 25 students = (35 × 25) = 875
Mean mark obtained by 35 students = 25
Sum of maths obtained by 35 students = (35 × 25) = 875
Mean of marks obtained by all the students = (875 + 875)/(25 + 35)
=> 1750/60
=> 29.16
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Answered by
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Answer:
mean = sum of all marks / no. of students
40 = sum of marks/ 35
sum of marks of students = 35 ×40
= 1400
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