The average of the marks obtained in an examination by eight students Was 51 and by nine other students were 68 the average of all 17 students were
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the total obtained by 8 students =51*8=408
another total marks obtained by 9 students =68*9=612.
total marks obtained by 17 students is equal to
408+612=1020
average =1020 divided by 17.
answer=50....☺
another total marks obtained by 9 students =68*9=612.
total marks obtained by 17 students is equal to
408+612=1020
average =1020 divided by 17.
answer=50....☺
Answered by
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Heya
Average marks of 8 students = 51
Average = sum of observations/number of observations
51 = sum of marks /8
Sum of marks of 8 students = 51×8 = 408
Similarly, sum of marks of other nine students is 68×9 = 612
Average marks of 17 students
= 408+612/17
= 1020/17
= 60
Hope it helps! ^_^
Average marks of 8 students = 51
Average = sum of observations/number of observations
51 = sum of marks /8
Sum of marks of 8 students = 51×8 = 408
Similarly, sum of marks of other nine students is 68×9 = 612
Average marks of 17 students
= 408+612/17
= 1020/17
= 60
Hope it helps! ^_^
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