In a class the average marks obtained in a science test by a group of 12 students is 70, by another group of 15 students is 85 and
that by another group of 18 students is 90. Find the average marks of all the students.
A84.5
B82.5
C83
D86
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
The sum of five numbers is 655. The average of the first two numbers is 75 and the third number is 114. Find the average of the remaining two numbers?
The mean of 10 numbers is 7 If each number is multiplied by 10 then the mean of new set of numbers is
A batsman has a definite average for 11 innings. That batsman scores 120 runs in his 12th innings due to which his average increased by 5 runs. Accordingly, what is the average of the batsman after 12 innings?
ആദ്യത്തെ 7 ഒറ്റ സംഖ്യകളുടെ ശരാശരി എന്ത് ?
The average weight of a group of 20 boys was calculated to be 65 kg and it was later discovered that the weight of a boy was misread as 76 kg instead of the correct weight 66 kg. The correct average weight was: